Hi Guys

This is driving me crazy but i want to have a drop down system it is for a car parts shop

So the Manufacturer <Top Categorie Box>
Model <Box with Sub Categories for Top Box>
Model Variant <Sub Cat of Sub Cat Box>

I have put the boxes into my site but i am not as good with the php coding, Has anyone got simmilar or would be able to work this out alot easier then me?

http://hardparts.com.au/

Thanks in advance
Mick