MenuSlider is a highly customisable vertical menu, offering unlimited nesting levels, and a choice of a wide range of drop-down sliding effects.
Navigate to the demo page for your relevant package to view a form with which you can customise the menu.
Note: The MenuSlider code on this website is domain restricted. As such, it is not possible to simply copy the code from these pages and re-use it on your website. The code that you receive upon purchase is not domain restricted, however.