This JomSocial Plugin lets you add an unlimited number of menus by simply pointing to a Joomla menu.
Usage is real simple. The plugin has a configuration option for you to tell it which Joomla menu id to use. I recommend just making a new menu for JomSocial. Once you’ve configured that just edit the menu as you normally would. Two notes to remember… First, top level menu items appear as tabs. Second, second level menu items appear under their parent tab. Pretty simple right? Have fun.
Update: The plugin has been updated to give administrators granular control over every built in menu item.