manage link categories in 2.1 ?

I would only show the image with the link, but it’s very complicate, now i have the title of the link category, but i don’t want show it ??

<?php wp_list_bookmarks(‘category=5&category_before=&category_after=&title_before=&title_after=&show_images=1&orderby=id&show_rating=1&show_updated=1’); ?>