I wish to show a menu so when user clicks a product, a jQuery runs to be able to reveal that particular item's contents.

Essentially is one thing such as this concept. There will be a menu and also the content could be preloaded. I'm stack there:

wp_nav_menu(array('menu'=> 'MainMenu_LogedIn', 'container_id' => 'mainMenu'));

How do i be aware of id's from the content this menu is pointing at?

I discovered that wp_get_nav_menu_items can retrieve menu objects. Can One make use of this also?