Collpase/Expand Menu

I'm looking for this to be completed today. It's pretty simple. I would like a menu made up of DIVs. When the menu is first viewed by the user, it is collapsed, once a Category image is clicked, it smoothly expands (a transition effect) and shows all the pages below it. This list of pages will be images too (there will be no text in this menu). If the user navigates to one of the pages it remembers/saves the layout (or if he comes back another day, it remembers the layout too) and makes the image for the active page indented - like a left padding. You won't need to do any image/graphic design, just the coding. Kind Regards, Nick.