Todo lo relacionado con categorias lo tengo aqui
Código PHP:
<?php
$category = get_the_category();
$current_cat = $category[0]->cat_ID;
?>
<?php if (is_single()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> » <?php the_category(', ') ?> » <?php the_title(); ?></div>
<?php } else if (is_home()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a></div>
<?php } else if (is_category()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> Categoria : <?php single_cat_title(); ?></div>
<?php } else if (is_tag()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> » Tag for <?php single_cat_title(); ?></div>
<?php } else if (is_page()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> » <?php the_title(); ?></div>
<?php } else if (is_archive()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> » <?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
<?php /* If this is a category archive */ if (is_day()) { ?>
Archives for <?php the_time('F jS, Y'); ?>
<?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
Archives for <?php the_time('F Y'); ?>
<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
Archives for <?php the_time('Y'); ?>
<?php } ?></div>
<?php } else if (is_search()) { ?>
<div id="breadcrumbs"><a href="<?php bloginfo('home'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a> » Your Search result for " <?php the_search_query(); ?> "</div>
<?php } else { ?>
<?php { /* nothing */ } ?>
<?php } ?>
No se si te servira de todas formas siguo buscando otra localizacion por si no te sirve