Categories gone after customization

[dabbuhl]

A client of mine called me with a problem. Here is the website:

 

http://www.jbhimports.com/osCommerce/

 

The problem is that they had someone customize the menu and somehow removed the Categories from the menu. How could they have done this and which file should I edit to add back in the Categories? Everything else seams to work fine but you can't look at any Categories.

 

In the backoffice admin, there doesn't seam to be anything done to the products or categories so I figure it is in the php file that they edited for the menu.

 

Please help if you can.