If you look further up in the source code, you'd see they have a <!-- BEGIN TEMPLATE: navbar -->
and no ending template for that one, so it's in there. Looking in there, you'd see these lines:
HTML Code:
<if condition="$show['forumdesc']">
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<tr>
<td class="alt1" width="100%"><strong>$foruminfo[title]</strong> <span class="smallfont">$foruminfo[description]</span></td>
</tr>
</table>
<br />
</if>
So, that is where you would make your changes.