Making Sidebar Menu More Stylish and Sub-Categoried

Hi there brothers!
I am nearly done with my new e-commerce project thanks to your awesome template. However, the normal categories look of bike store is the only thing I can't use. Here's my url: http://www.plakdunyasi.com/demo
Store page url: http://www.plakdunyasi.com/demo

The think is,
"Yabancı LP"
"Yerli LP"

are sub-categories to "Plak", however it shows on the same column. I have searched for modules, everything has become buy-to-use. Even simple ones. Only free one is phoca dtree module, but it doesn't work.

Can I make the menu look with sub-categories a bit inside so people would understand so?

and is there a way I can add menu images, which is from template typh. such as <ul class="gkCircle1"> etc.

Thanks.

To extarct what I mean with making the menu more stylish, is there a way I can put a splitter and module name, a grayish one.