[Adrian Schneider]

It's best to modify $cells via plugin (hook: usercp_nav_start).

Assuming your adding links to it, you need a few things in your file:

PHP Code:

require_once(DIR . '/includes/functions_user.php'); 


this allows you to use the function which highlights your new links.

PHP Code:

construct_usercp_nav('Name_Of_Cell'); 


of course replacing Name_of_Cell with your modified/added cells in the $cells array.