Mostrar categorias en 2 columnas, como?

[RGT]

el problema esta en que cuanto agrego eso, la primera columna queda muy a la izquierda, y la segunda columna muy a la derecha.

aqui mi css

Código:

* {
	margin:0;
	padding:0;
}
abbr[title], acronym[title] {
	border-bottom:thin dotted;
	cursor:help;
}
body {
	background:#BEC3C6 url(img/bg.jpg) repeat-x;
	color:#555;
	font-family:Verdana,"BitStream vera Sans",Helvetica,Sans-serif;
	font-size:12px;
}
h1, h2, h3, h4, h5, h6 {
	font-weight:bold;
	letter-spacing:-0.05em;
	font-family:Arial;
}
h1 {font-size:200%;}
h2 {font-size:170%;}
h3 {font-size:150%;}
h4 {font-size:130%;}
h5 {font-size:110%;}
h6 {font-size:100%;}
img {
	border:0;
}
img.sided {
	background:#FFF;
	border:1px solid #CCC;
	padding:3px;
}
small {
	font-size:10px;
}
a:hover img.sided {
	border-color:#A6A6A6;
}
a {
	color:#2970A6;
	text-decoration:none;
}
a:hover {
	text-decoration:underline;
}
.wp-caption {
	background:#F7F7F7;
	border:1px solid #CCC;
	padding:5px 0;
	margin-bottom:5px;
	text-align:center;
}
.wp-caption img {
	margin:0 5px;
}
.wp-caption-text {
	text-align:center;
	padding:0 5px !important;
	padding:3px 5px 0;
}
*+html .wp-caption-text {
	padding:3px 5px 0 !important;
}
.post .content .wp-caption p {
	margin:0;
}
blockquote, pre {
	background:#F4F5F7 url(img/blockquote.gif) 3px 3px no-repeat;
	border:1px dashed #CCC;
	padding:8px 12px 8px 36px;
	margin:5px 0;
}
.more-link {
	font-size:11px;
}
.alignleft {
	float:left;
	text-align:left;
	margin-right:10px;
}
.alignright {
	float:right;
	text-align:right;
	margin-left:10px;
}
.aligncenter {
	display: block;
	margin-left: auto;
	margin-right: auto;
}
.floatleft {
	float:left;
}
.floatright {
	float:right;
}
.left {
	float:left;
	margin-right:10px;
}
.right {
	float:right;
	margin-left:10px;
}
.fixed, .clear {
	clear:both;
}
input.textfield, 
textarea {
	background:#FFF url(img/textfield.gif) top repeat-x;
	border:1px solid #A6A6A6;
	padding:2px 1px;
	font-size:12px;
}
.boxcaption {
	background:#E3E4E6 url(img/box.gif) 0 0 no-repeat;
	padding:6px 12px;
	border-bottom:1px solid #CCC;
}
.boxcaption h3 {
	font-size:12px;
	font-family:Verdana,"BitStream vera Sans";
	letter-spacing:0em;
}
.box {
	background:#F4F5F7 url(img/box.gif) 100% 100% no-repeat;
	padding:8px 12px;
	margin-bottom:10px;
}
.messagebox, 
.errorbox {
	background:#EDEFF0 url(img/messagebox.gif) no-repeat;
	padding:0 12px;
	height:27px;
	line-height:27px;
	font-size:11px;
}
.w3c {
	color:#080;
	font-size:10px;
}
/* static END */

/* layout START */
#wrap {
	background:url(img/light.gif) center top no-repeat;
	padding:20px 0;
}
#container {
	margin:0 auto;
	width:936px;
}
/* layout END */

/* header START */
#header {
	background:url(img/header.jpg) 0 0 no-repeat;
	height:90px;
	border-bottom:1px solid #A6A6A6;
}
#caption {
	padding:25px 30px 0;
}
#title a {
	text-decoration:none;
	color:#FFF;
	height:30px;
	display:block;
	font-family:"Trajan Pro";
	letter-spacing:0;
}
/* image blog title */
/*
#title a {
	background:url(img/title.gif) no-repeat;
	text-decoration:none;
	color:#FFF;
	width:250px;
	height:30px;
	text-indent:-999em;
	display:block;
}
*/
#tagline {
	color:#FFF;
	border-top:1px solid #FFF;
	text-decoration:none;
	font-size:10px;
	float:left;
	padding:0 3px;
}
#header .banner {
	float:right;
	padding:15px 15px 0;
	color:#999;
}
/* header END */

/* navigation START */
#navigation {
	background:#FFF;
	border-bottom:1px solid #A6A6A6;
}
#menus li {
	display:inline;
	list-style:none;
}
#menus li a {
	background:transparent url(img/menu.gif) no-repeat;
	display:block;
	color:#382E1F;
	height:31px;
	line-height:31px;
	padding:0 20px;
	margin-left:-10px;
	text-decoration:none;
	font-size:11px;
	float:left;
	z-index:1;
}
#menus li a:hover, 
#menus li a.current {
	background-position:0 -31px;
}
#menus li.current_page_item a, 
#menus li.current-cat a {
	background-position:0 -62px;
}
#menus li a.home {
	background-position:0 -93px;
	width:45px;
	padding:0;
	margin-left:0;
	text-indent:-999em;
}
#menus li a.home:hover {
	background-position:0 -124px;
}
#menus li.current_page_item a.home {
	background-position:0 -155px;
}
#menus li a.lastmenu:hover {
	background-position:0 0;
	cursor:default;
}
#searchbox {
	background: url(img/searchbox.gif) no-repeat;
	width:209px;
	height:23px;
	display:block;
	float:right;
	margin-top:4px;
	margin-right:10px !important;
	margin-right:5px;
	padding:2px;
}
#searchbox .textfield {
	background:none;
	border:0px;
	width:185px;
	float:left;
	margin-right:2px;
	padding-left:2px;
}
#searchbox .button {
	background:none;
	border:0px;
	width:18px;
	height:18px;
	cursor:pointer;
	float:left;
	margin-top:1px;
}
#searchbox .searchtip {
	color:#999;
}
/* navigation END */

/* submenu START */
#menus li ul {
	display:none;
	background:#F4F5F7;
	border:1px solid #CCC;
	border-top-color:#A6A6A6;
	padding:0 5px;
}
#menus li li {
	float:none;
	margin:0 !important;
	margin:0;
	padding:0;
	display:block;
	list-style:none;
}
#menus li li a {
	float:none;
	display:block;
	padding:7px 5px;
	text-decoration:none;
	width:200px;
	border-style:solid;
	border-color:#DDD;
	border-width:1px 0 0;
	margin:0;
	background-image:none;
	height:auto;
	line-height:145%;
	color:#999;
}
#menus li li.first a {
	border-top:none;
}
#menus li li a:hover {
	color:#382E1F;
}
/* submenu END */

/* content START */
#content {
	background:#FFF url(img/sidesep.gif) right repeat-y;
	min-height:400px;
}
/* content END */

/* main START */
#main {
	background:#FFF url(img/main_shadow.gif) top repeat-x;
	width:605px;
	padding:13px 15px 15px;
	float:left;
	overflow:hidden;
}
#notice {
	color:#080;
}
#notice a {
	text-decoration:underline;
}
.post {
	padding-bottom:5px !important;
	padding-bottom:15px;
}
*+html .post {
	padding-bottom:15px !important;
}
.post h2 {
	display:block;
	margin-top:10px;
	border-bottom:1px solid #CCC;
	padding:0 5px 3px;
	font-size:16px;
	font-family:Verdana,"BitStream vera Sans";
}
.post h2 a.title {
	text-decoration:none;
	color:#4C4C4C;
}
.post h2 a.title:hover {
	color:#2970A6;
}
.post h2 .act a {
	font-weight:normal;
}
.post .info {
	margin:5px;
}
.post .info span.first {
	margin-left:0;
}
.post .date, 
.post .author, 
.post .editpost, 
.post .comments, 
.post .addcomment, 
.post .addlink, 
.post .editlinks {
	background:url(img/icons.gif) no-repeat;
	padding-left:22px;
	height:16px;
	line-height:16px;
	display:block;
	font-size:11px;
}
.post .tags, 
.post .categories {
	background:url(img/icons.gif) no-repeat;
	width:16px;
	height:16px;
	line-height:16px;
	display:block;
	text-indent:-999em;
}
.post .under span.tags, 
.post .under span.categories {
	margin-right:6px;
}
.post .act {
	height:16px;
	float:right;
}
.post .act span {
	float:left;
	margin-left:15px;
}
.post .tags {
	background-position:0 -400px;
}
.post .categories {
	background-position:0 -480px;
}
.post .date {
	background-position:0 -48px;
	margin-right:15px;
	float:left;
}
.post .author {
	background-position:0 0;
	float:left;
}
.post .editpost {
	background-position:0 -64px;
	margin-left:15px;
	float:right;
}
.post .comments {
	background-position:0 -96px;
	float:right;
}
.post .addcomment {
	background-position:0 -112px;
	margin-left:15px;
	float:right;
}
.post .addlink {
	background-position:0 -176px;
}
.post .editlinks {
	background-position:0 -192px;
}
.post .content {
	padding:5px 0 0 5px;
	line-height:145%;
	overflow:hidden;
}
.post .content p {
	margin-bottom:10px;
}
.post .under {
	height:16px;
	line-height:16px;
	font-size:11px;
	margin-bottom:10px;
}
.post .under span {
	float:left;
	margin-right:15px;
}
.post .content h4 {
	color:#080;
	margin-bottom:10px;
}
.post .content img {
	max-width:600px;
}
.post .content ul, 
.post .content ol {
	padding-bottom:10px;
}
.post .content ul li, 
.post .content ol li {
	list-style-position:inside;
	padding-left:20px;
}
.post .content table {
	background:#FFF;
	border:2px solid #CCC;
	border-collapse:collapse;
	margin:5px 0 10px;
}
.post .content th, 
.post .content td {
	border:1px solid #CCC;
	padding:3px 10px;
	text-align:left;
	vertical-align:top;
}
.post .content tr.even td {
	background:#F7F7F7;
}
.post .content th {
	background:#EDEFF0;
}
.post .content .boxcaption {
	background-image:url(img/postbox.gif);
}
.post .content .box {
	background-image:url(img/postbox.gif);
}
#postpath {
	background:url(img/icons.gif) 0 -320px no-repeat;
	line-height:16px;
	margin:5px 0;
	padding-left:22px;
}
#pagenavi, 
#postnavi {
	border-top:1px solid #CCC;
	margin:10px -5px 0;
	padding:10px 5px 0;
}
#pagenavi {
	font-size:11px;
}
#pagenavi .newer a, 
#postnavi .prev a {
	background:url(img/icons.gif) 0 -224px no-repeat;
	padding-left:22px;
	float:left;
	height:16px;
	line-height:16px;
}
#pagenavi .older a, 
#postnavi .next a {
	background:url(img/icons.gif) 100% -240px no-repeat;
	padding-right:22px;
	float:right;
	height:16px;
	line-height:16px;
}
/* main END */

/* sidebar START */
#sidebar {
	background:#F7F7F7 url(img/sidebar_shadow.gif) top repeat-x;
	width:300px;
	float:right;
	font-size:95%;
	line-height:145%;
	overflow:hidden;
	padding-top:8px;
}