Ubieras puesto un screenshot y te decia que modificar
Prueba con este Codigo:
Código:
<table border="0" cellspacing="0" cellpadding="0" class="tborder2">
<thead>
<tr>
<td class="thead" colspan="6">
<div class="theadleft"></div>
<div class="theadright"></div>
<div class="theadmain">
<div class="expcolimage"><img src="{$theme['imgdir']}/{$expcolimage}" id="cat_{$forum['fid']}_img" class="expander" alt="{$expaltext}" title="{$expaltext}" /></div>
<div><strong><a href="{$forum_url}">{$forum['name']}</a></strong><span class="smalltext">{$forum['description']}</span></div>
</div>
</td>
</tr>
</thead>
</table>
<table border="0" cellspacing="{$theme['borderwidth']}" cellpadding="{$theme['tablespace']}" class="tborder">
<tbody style="{$expdisplay}" id="cat_{$forum['fid']}_e">
<tr>
<td class="tcat" colspan="3"><span class="smalltext"><strong>{$lang->forumbit_forum}</strong></span></td>
<td class="tcat" width="85" align="center" style="white-space: nowrap"><span class="smalltext"><strong>{$lang->forumbit_threads}</strong></span></td>
<td class="tcat" width="85" align="center" style="white-space: nowrap"><span class="smalltext"><strong>{$lang->forumbit_posts}</strong></span></td>
<td class="tcat" width="200" align="center"><span class="smalltext"><strong>{$lang->forumbit_lastpost}</strong></span></td>
</tr>
{$sub_forums}
</tbody>
</table>
<br />
cala este aver como queda


<table border="0" cellspacing="0"
cellpadding="0" class="tborder2">
<thead>
<tr>
<td class="thead" colspan="6">
<div class="theadleft"></div>
<div class="theadright"></div>
<div class="theadmain">
<div class="expcolimage"><img src="{$theme['imgdir']}/{$expcolimage}" id="cat_{$forum['fid']}_img" class="expander" alt="{$expaltext}"
title="{$expaltext}" /></div>
<div><strong><a href="{$forum_url}">{$forum['name']}</a></strong> - {$forum['description']}</div>
</div>
</td>
</tr>
</thead>
</table>
<table border="0" cellspacing="{$theme['borderwidth']}" cellpadding="{$theme['tablespace']}" class="tborder">
<tbody style="{$expdisplay}" id="cat_{$forum['fid']}_e">
<tr>
<td class="tcat" colspan="3"><span
class="smalltext"><strong>{$lang->forumbit_forum}</strong></span></td>
<td class="tcat" width="85" align="center"
style="white-space: nowrap"><span
class="smalltext"><strong>{$lang->forumbit_threads}</strong></span></td>
<td class="tcat" width="85" align="center"
style="white-space: nowrap"><span
class="smalltext"><strong>{$lang->forumbit_posts}</strong></span></td>
<td class="tcat" width="200"
align="center"><span
class="smalltext"><strong>{$lang->forumbit_lastpost}</strong></span></td>
</tr>
{$sub_forums}
</tbody>
</table>
<br />
(26 May, 2012, 6:35 pm)DRAGONS escribió: cala este aver como queda


<table border="0" cellspacing="0"
cellpadding="0" class="tborder2">
<thead>
<tr>
<td class="thead" colspan="6">
<div class="theadleft"></div>
<div class="theadright"></div>
<div class="theadmain">
<div class="expcolimage"><img src="{$theme['imgdir']}/{$expcolimage}" id="cat_{$forum['fid']}_img" class="expander" alt="{$expaltext}"
title="{$expaltext}" /></div>
<div><strong><a href="{$forum_url}">{$forum['name']}</a></strong> - {$forum['description']}</div>
</div>
</td>
</tr>
</thead>
</table>
<table border="0" cellspacing="{$theme['borderwidth']}" cellpadding="{$theme['tablespace']}" class="tborder">
<tbody style="{$expdisplay}" id="cat_{$forum['fid']}_e">
<tr>
<td class="tcat" colspan="3"><span
class="smalltext"><strong>{$lang->forumbit_forum}</strong></span></td>
<td class="tcat" width="85" align="center"
style="white-space: nowrap"><span
class="smalltext"><strong>{$lang->forumbit_threads}</strong></span></td>
<td class="tcat" width="85" align="center"
style="white-space: nowrap"><span
class="smalltext"><strong>{$lang->forumbit_posts}</strong></span></td>
<td class="tcat" width="200"
align="center"><span
class="smalltext"><strong>{$lang->forumbit_lastpost}</strong></span></td>
</tr>
{$sub_forums}
</tbody>
</table>
<br />

quedo bien lo unico que la categoria ahora es cuadrada no tiene las puntas asi en curba eso como lo podria cambiar? gracias.