View file design/themes/web/default/views/layouts/footer.php

 </div>
</td>
 </tr>
 </table>
<div class="foot">
	<span class="foot">
	<?=System::styleSwitcher(); ?>
	</span>
	<span class="foot_c">
	<?=Lang::get('users_online'); ?>: [<a href="/user/online"><?=$users; ?></a>/<a href="/index/guests"><?=$guests; ?></a>] <a href="http://perfcms.net/">&copy;</a>
	</span>
</div>
<?=$this->widgets('footer'); ?>
</div>
</body>
</html>