This is a module used in a larger JS file that adds classes to the selected navigation tab.

Mega Menu Tabs

tabs: function (element, hover) {
        var scope = element,
            $contentTabs = $jQ(scope + ' > .tab-content > .tab'),
            activeClass = 'active';

        $jQ(scope + ' > .tab-menu > .tab').each(function (i, el) {
            $jQ(this).add($contentTabs[i]).attr('tab', i + 1);
        });

        $jQ(scope + ' > .tab-menu > .tab').on((hover ? 'mouseenter' : 'click'), function (e) {
            if (!hover) {
                e.preventDefault();
            }

            var tab = $jQ(this).attr('tab');
            $jQ(scope + ' > .tab-menu > .tab').add(scope + ' > .tab-content > .tab').removeClass(activeClass);
            $jQ(this).add(scope + ' > .tab-content > .tab[tab=' + tab + ']').addClass(activeClass);
        });
        $jQ(scope + ' > .tab-menu > .tab:first-child').add(scope + ' > .tab-content > .tab:first-child').addClass(activeClass);
    },