the sidebar of my site is getting too long and i would like to do a tree menu. however, the one you guys pointed to me wasnt what i wanted. what i want works like this:i click on the main category, it brings me to a page and ONLY the articles for the site are expanded in the sidebar.click on another main category and it brings me to another page and ONLY the articles for that category expands in the sidebar, the rest will be closed. so basically, as long as you are reading an article from the family category, only the famliy articles appear in the sidebar. if you are reading an article from the health category, only the health articles appear in the sidebar. it's very similar to the one in about.com.