ERROR strict Standards Walker Menu

[galob]

Hola Siddharta muchas gracias por tu respuesta. la verdad no me manejo a fondo con PHP pero aca esta la linea de codigo del menu walker:


/*---------------------------------
Redefine menu structure with a walker class
------------------------------------*/

class menu_default_walker extends Walker_Nav_Menu
{

function start_lvl(&$output, $depth){
$output .= '<ul class="clearfix">';
}

function display_element($element, &$children_elements, $max_depth, $depth=0, $args, &$output){
$id_field = $this->db_fields['id'];
if ( is_object( $args[0] ) ) {
$args[0]->has_children = ! empty( $children_elements[$element->$id_field] );
}
return parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
}


function start_el(&$output, $item, $depth, $args, $id =0) {
global $wp_query;
global $rb_submenus;

$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

$new_output = '';
$depth_class = ($args->has_children ? 'parent ' : '');

$class_names = $value = '';
$classes = empty($item->classes) ? array() : (array) $item->classes;

$current_indicators = array('current-menu-item','current-menu-parent','current_page_item','current_page_parent', 'current-menu-ancestor');

$newClasses = array();
foreach($classes as $el)
if(in_array($el,$current_indicators))
array_push($newClasses,$el);

$class_names = join(' ',apply_filters('nav_menu_css_class',array_filter( $newClasses),$item));

if($class_names != '') {
$class_names = ' class="' . $depth_class . 'selected"';
} else if($class_names == '') {
$class_names = ' class="' . $depth_class . 'menu-item"';
}

if ( !get_post_meta( $item->object_id , '_members_only' , true ) || is_user_logged_in() ) {
$output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $class_names . '>';
}

$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';

$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
$item_output .= '</a>';
$item_output .= $args->after;


if ( !get_post_meta( $item->object_id, '_members_only' , true ) || is_user_logged_in() ) {
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args, $id );
}

$output .= $new_output;

}

function end_el(&$output, $item, $depth) {
if ( !get_post_meta( $item->object_id, '_members_only' , true ) || is_user_logged_in() ) {
$output .= "</li>\n";
}
}

function end_lvl(&$output, $depth) {

$output .= "</ul>\n";

}

}


espero me puedas ayudar...
gracias!