product list show when click on respected category name in top menu

[geneesys]

I need to get a functionality , when we click on category name in top menu , the products under that respected category
show in a list in a block in left column .

For demo, see this : http://www.fishingfliesonline.com/products/products_detail.asp?catid=11

Sample file attached with snap-shot of top menu and product list in a left column.

Can one help me out in getting this feature on the website..


Thanks.