// add active class to nav based on url
$('.section-middle-nav .sidebar-box a[href^="/' + location.pathname.split("/")[1] + '"]').addClass('active');
// add active class to parent of submenu items (wordpress version with full url)
var url = window.location.href;
url = url.slice(0, url.lastIndexOf('/'));
url = url.slice(0, url.lastIndexOf('/'));
$('#Top_bar a[href^="' + url + '"]').parent().addClass('current-menu-item');