Stefan,
Works great! But I went one step further, trying to add an image in front of "subforums: but I get errors... ideas?
PHP Code:
SET subforums=CONCAT(subforums,IF(subforums='', '<br><IMG SRC=\"images/arrow.gif"\">"
Subforums: ', ', '), '<a href=\"forumdisplay.php?forumid=" . $forum['forumid'] . "\">".addslashes($forum['title'])."
</a>') WHERE forumid != $forum[forumid] AND forumid IN ($forum[parentlist])");