Introduction to Accordion for Quick Launch
The one I like most is Accordion for Quick Launch. It is a simple JQuery script that allows users to collapse and expand sections of a SharePoint Quick Launch menu (the latest version even remembers the ones you expanded previously).
Deploying Paul’s solution is really easy. You can paste the entire script to the Content Editor Web part, or deploy the pre-packed webpart that does that.
When you are working on a large SharePoint project, deploying a webpart to each page (default.aspx, each list view, each custom web part page…) might be a mission impossible. So to overcome this problem I decided to place Paul’s script to the master page allowing me to automatically apply the solution to all pages on a SharePoint site. Read the entire article …