Removing small bit of code

Hey I just want to remove a small piece of code from the links section. When I add links to my site through the admin control panel it adds
< li id = “” >
at the beginning of the code.
So in this part
<?php get_links_list(); ?>, right at the begginning < li id = “” > is added. I just want to remove it because it makes my menu design like it has to li tags in one spot, and adds 2 borders around the links.
So does anyone know which php file I have to edit to remove this, (Im very new to php)