einfach die footer.php editieren
/httpdocs/wordpress/wp-content/themes/<THEMENAME>

<?php
/**
* The template for displaying the footer.
*
* Contains footer content and the closing of the
* #main and #page div elements.
*
* @package WordPress
* @subpackage Twenty_Twelve
* @since Twenty Twelve 1.0
*/
?>
</div><!– #main .wrapper –>
<footer id=”colophon” role=”contentinfo”>
Ein weiteres WordPress-Projekt von KOMDAT – <a href=”http://www.komdat.at” target=”_blank”>http://www.komdat.at</a>
</footer><!– #colophon –>
</div><!– #page –>
<?php wp_footer(); ?>
</body>
</html>