And while I think of it, board index categories are going to be marked up like this (stripped most of the php for brevity):
<section class="forum_category" id="category_', $category['id'], '">
<h2 class="category_header">';
<a class="collapse" href="#" title="">', $category['collapse_image'], '</a>
The usual board name....
</h2>
<ul class="category_boards" id="">';
<li class="board_row ', (!empty($board['children'])) ? 'parent_board':'', '" id="">
<div class="board_info">
<a class="icon_anchor" href="#">
<img class="board_icon" src="on.png" alt="" title="" />
</a>
<h3 class="board_name">
<a href="', $board['href'], '" id="b', $board['id'], '">
The usual board name....
</a>
</h3>
<p class="board_description">
Board description stuffz...
</p>
<p class="board_moderators">
The usual list of mods....
</p>
</div>
<div class="board_latest">
<p class="board_stats">
Post count...
Topic count...
</p>
<p class="board_lastpost">
Timestamp, post title, etc...
</p>
</div>
</li>
<li class="childboard_row">
<h4>', $txt['parent_boards'], ':</h4>
<ul class="childboards"> The usual list of child boards... </ul>
</li>
</ul>
</section>