[kh99]

The last child? Maybe something like this:

PHP Code:

global $forum_counter; 
$show['forumbit_ad'] = false; 
if ($depth == 1) 
   $forum_counter = 0; 
else if ($depth == 2) 
   $show['forumbit_ad'] = !(++$forum_counter % 4);
$children = array_values($vbulletin->iforumcache["$parentid"]);
$show['last_child_forum'] = (end($children) == $forumid); 


Then in the template

<vb:if condition="$show['last_child_forum']">LAST</vb:if>