$(document).ready(function() {
  /** add active class and stay opened when selected */
  var url = window.location;

  // for sidebar menu entirely but not cover treeview
  $('ul.nav-sidebar a').filter(function() {
      return this.href == url;
  }).addClass('active');

  // for treeview
  $('ul.nav-treeview a').filter(function() {
      return this.href == url;
  }).parentsUntil(".nav-sidebar > .nav-treeview").addClass('menu-open').prev('a').addClass('active');
})