More at my del.icio.us: "; //append links for each category foreach(get_the_category() as $cat) { $delicious_links .= "cat_name\">$cat->cat_name "; } $delicious_links .= "

"; //return post text with delicious_links added return $post_text.$delicious_links; } //action hook to handle post content add_action('the_content', 'add_links'); ?>