Problema con FOREACH

[the_web_saint]

Prueba de esta forma!

echo "<table border='10' id='tabla'>";
echo "<tr><th bgcolor='#C0D9D9'>Fecha</th><th bgcolor='#C0D9D9'>Categoria</th><th bgcolor='#C0D9D9'>Cod</th><th bgcolor='#C0D9D9'>Descripcion</th><TH bgcolor='#C0D9D9'>Unidad</th><TH bgcolor='#C0D9D9'>Cantidad</th>";
$i = 1;
while($sql = mysql_fetch_array($consulta))
{
echo "<tr>";
echo "<td>".$fecha_."</td>";
echo "<td>".$sql['subcategoria']."</td>";
$subcat = $sql['subcategoria'];
echo "<td>".$sql['codigo']."</td>";
$codigo = $sql['codigo'];
echo "<td>".$sql['descrip']."</td>";
$desc = $sql['descrip'];
?><td class="unidad"><input type="text" name="und[<?php echo $i; ?>]" id ="und[<?php echo $i; ?>]"></td>
<td class="cantidad"><input type="text" name="cant[<?php echo $i; ?>]" id ="cant[<?php echo $i; ?>]"></td> <?
echo "</tr>";
$i++;
}
echo "</table>";