PHP Custom Shopping Cart Application

We are need of a custom shopping cart website(no osCommerce implementation) which is similar to xtrememac.com. Following should be the features of the application # Dynamic menu similar to [login to view URL](2 or 3 level drop down menu) # Shopping cart application should consist of all the application features similar to [login to view URL] # Admin module of the application should consist of @ Ability to customize menu items to be displayed as drop down menu @ All the modules of a typical shopping cart application.