Cataire

I meant <a> tags.

Thanks a lot madmax7, that really helped.

I had an odd problem, breadcrumbs were displayed for every page but the post pages, unless i was logged as an admin.

Following your idea, I also managed to display the post’s categories by changing :

if (is_single() && $opt['singlecatprefix']) {
			$cats = get_the_category();

to

if (is_single() && $opt['singlecatprefix']) {
			$cats = get_the_category($wp_query->post->ID);