Buka file berikut:

../templates/<nama-template>/html/mod_footer/default.php

Contoh untuk template ja purity II :

Original file default.php;

<?php
/*
#------------------------------------------------------------------------
 JA Purity II for Joomla 1.5
#------------------------------------------------------------------------
#Copyright (C) 2004-2009 J.O.O.M Solutions Co., Ltd. All Rights Reserved.
#@license - GNU/GPL, http://www.gnu.org/copyleft/gpl.html
#Author: J.O.O.M Solutions Co., Ltd
#Websites: http://www.joomlart.com - http://www.joomlancers.com
#------------------------------------------------------------------------
*/ 

// no direct access
defined('_JEXEC') or die('Restricted access'); ?>
<small><?php echo $lineone; ?> Designed by <a href="http://www.joomlart.com/" title="Visit Joomlart.com!">JoomlArt.com</a>.</small> 
<small><?php echo JText::_( 'FOOTER_LINE2' ); ?></small>

Edit pada bagian yang saya bold.., misal jadi seperti ini;

<?php
/*
#------------------------------------------------------------------------
 JA Purity II for Joomla 1.5
#------------------------------------------------------------------------
#Copyright (C) 2004-2009 J.O.O.M Solutions Co., Ltd. All Rights Reserved.
#@license - GNU/GPL, http://www.gnu.org/copyleft/gpl.html
#Author: J.O.O.M Solutions Co., Ltd
#Websites: http://www.joomlart.com - http://www.joomlancers.com
#------------------------------------------------------------------------
*/

// no direct access
defined('_JEXEC') or die('Restricted access'); ?>
<small><?php echo $lineone; ?> <!-- REMOVE-HERE --></small>
<small><?php echo JText::_( 'FOOTER_LINE2' ); ?></small>