PHP Code:
<div id="siteinfoLegal" class="legalCopyright"><?php echo FOOTER_TEXT_BODY; ?></div>
They could have put their link into FOOTER_TEXT_BODY. Find the define for that in /includes/languages/your_template/english.php.
The stock define looks like this (Line #15):
PHP Code:
define('FOOTER_TEXT_BODY', 'Copyright © ' . date('Y') . ' <a href="' . zen_href_link(FILENAME_DEFAULT) . '" target="_blank">' . STORE_NAME . '</a>. Powered by <a href="http://www.zen-cart.com" target="_blank">Zen Cart</a>');