I have a modified manufacturer infor box on the left column at our webshop previously done by someone (we lost the contact). See the following link. [url removed, login to view]
At this stage, the first box is to select the manufacturers, the second is to select the products arranged according to the categories.
We would like have it to be changed to 3 selection box with the second one contains the categories under the selected manufacturer and the third one with the products under the selected manufacturer and category.