Explr is a jQuery plugin that will create a simple tree from a normal menu list with ul-li-a pattern into a hierarchical tree by simply call explrTree() function, or with some options if you want to, in javascript section
Features: Simple and lightweight (2.6KB minified JS + 7.5KB CSS ) Menu items could be set to start expanded/collapsed 50+ custom icons ready for individual/multiple menu item(s) Supports AJAX contents to be loaded from each menu item’s href destination Supports multiple tree in one page Requires only semantic markups: ul, li, a Styling is customizable via CSS Cross-browser compatible Session cookies (to keep the tree state when load new page)