Some themes or sites are well branched and navigation may go deeper than 2 levels only. In such cases building nested list of categories/subcategories (or pages/subpages) may look silly but in the same time 100% functional. Honestly, I’m not a fan of displaying mini site-map either in sidebar or drop-down so building sequential navigation in conjuction with breadcrumbs would be much more elegant solution.

I guess building sequential navigation will be the subject of another tutorial, right now we’ll stay focused on breadcrumbs only.

What are breadcrumbs? These are nothing but a road map of your site. They will help visitor to navigate easily and not allow to make him lost. Just take a look above the title of this article and everything will be clear enough.

<?php
	//where are we now?
	$categ_sp = get_the_category();
	//are there any parent categories?
	$my_parents = get_category_parents( $categ_sp[ 0 ]->cat_ID, TRUE, ',' );
	$arr_parents = explode( ',', $my_parents );
	//remove the last empty one if any
	array_pop( $arr_parents );
	if( count( $arr_parents ) > 1 ) {
		echo '<div id="breadcrumbz">';
		echo '<ul>';
		echo '<li><a href="' . get_option( 'home' ) . '">Home</a> &nbsp; &gt;</li>';
		$x = 0;
		while( $x < count( $arr_parents ) ) {
			echo '<li>' . $arr_parents[ $x ] . ' &nbsp; &gt;</li>';
			$x ++;
		}
		//for a case we are currently reading single article display title, not as a link
             if( is_single() ) echo '<li>' . get_the_title() . '</li>';
		echo '</ul>';
		echo '</div>';
	}
?>

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