Editing theme to add accordion

[ninocass]

Hi all,

I have a gallery located at: www.nino.me.uk/gallery/

I want to have the catagories contained within an accordion, a section per slidey bit. 

Im going to use javascript so its a matter of placing the code before and after the catagory sections.

Im having some issues finding where this code goes, im assuming its somwhere in the core php files?

Many Thanks

nino