При создании темы с двумя -- (дефисами) возникает проблема

$post_form = <<<DATA
<script type="text/javascript" language="JavaScript" src="javascript/formcode.js"></script>
<!-- <div id="replyform"><a name="formtop"></a>
<form action="post.php" method="POST" name="postform" onSubmit="SubmitControl(this)">
<input type="hidden" name="action" value="addreply">
<input type="hidden" name="forum" value="{$forum_id}">
<input type="hidden" name="topic" value="{$topic_id}">
<input type="hidden" name="previewfirst" value="no">
<input type="hidden" name="notify" value="no">
<table class="tableborder" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td class="maintitle" colspan="3"><img src="./templates/InvisionExBB/im/nav_m.gif" border="0" alt="&gt;" width="8" height="8" />&nbsp;Быстрый ответ в тему "{$topic['name']}"</td>
</tr>
<tr>
<td class="tablepad" width="30%">&nbsp;</td>
<td class="tablepad" nowrap="nowrap" align="left" width="440">
<textarea cols='70' rows='8' name="inpost" class='textinput' tabindex="1"></textarea>
<br />
<br />
<div align="center">
<input type="submit" name="DoSend" onClick="return Formchecker(this.form)" value={$fm->LANG['Send']} class="forminput" tabindex="2" accesskey="s" />&nbsp;
<input type="reset" value="Очистить" class="forminput" />&nbsp;&nbsp;
<input type="button" value="Больше опций" class="forminput" onClick="location.href='post.php?action=reply&forum={$forum_id}&topic={$topic_id}'"/>
</div>
</td>
<td class="tablepad" width="30%">&nbsp;</td>
</tr>
</table>
</form>
</div> -->
DATA;

$post_form .= <<<DATA
<br />
<div id="replyform">

$post_form .= <<<DATA
<script type="text/javascript" language="JavaScript" src="javascript/formcode.js"></script>
<br />
<div id="replyform">