zencart footer is in includes>laguages>english.php
Code:
$FOOTER_TEXT='<br><a href="http://www.cheapglasses123.com" target="_blank" class="box_ex1_link">Reading Glasses</a> | ';
$FOOTER_TEXT.='<a href="index.php" class="box_ex1_link">Prescription Glasses</a>';
$FOOTER_TEXT.='<font style="font-family:Arial, Helvetica, sans-serif; font-size:12px">';
$FOOTER_TEXT.='<br>Copyright 2009 www.PrescriptionGlasses123.com and its licensors. All Rights Reserved</font>';