Top menu that display suppliers and their product categories

[jumprock]

HI, I'm looking to replicate the standard top menu functionality but instead of displaying product categories as the top level I need to display the suppliers, with the second drop down level being the categories each supplier has supplied products for. There will probably be crossover of categories between suppliers too meaning that the same category may appear under both.

 

Is this possible?? One thing to point out is that I could construct the menu manually but I'm really looking for a way that prestashop can do it manually.