where to remove “title=” link name from <a href> tag?

Hello,

I have a client who wants the <title=”link name”> part removed from the a href tags for the page links. I’m currently using Theme df_simpress with code:

<?php
wp_list_pages('sort_column=menu_order&title_li='); ?>

to display pages. The theme does not come with page.php and I can’t seem to find the code that outputs this so I can remove the “title” element.

Can anyone guide me in the right direction?

Thanks.

-Josh