Need to tweak the menu so that when you click on the item other

Need to tweak the menu so that when you click on an item, others were closed. Normal toggle to the menu item. The site on the bootstrap laid out, but for some reason the standard toggle Collapse does not work. The idea is not a difficult job but access to the site there, so I have to transfer simply a line of script to test employees. It will be possible to test via the console of the browser I think without problems. If native bootstrap do not work, you can write a small script, only without the trash, please. But in General, the implementation is not important, it is necessary that when clicking on a menu item, others went into hiding. Now they all open one after the other. The website