Oscommerce Categories Modification

Easy job for an Oscommerce / PHP pro . Need customization to a categories menu to show all categories and sub-categories (already have this code), however I need modification to be able to limit the number of subcategories shown under the parent. Max budget $15 - $20 need this asap. You can use default oscommerce install to show example. PM for questions or details. Category 1 sub-cat sub-cat sub-cat //limit 3 sub-cats Category 2 sub-cat sub-cat sub-cat //limit 3 sub-cats Category 3 sub-cat sub-cat sub-cat //limit 3 sub-cats