Bootstrap and jQuery.mmenu

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/js/addons/jquery.mmenu.fixedelements.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/js/jquery.mmenu.min.js"></script>
<div style="min-height: 100%">
  <div class="header">
    <nav class="navbar navbar-default ">
      <div class="container-fluid">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-6" aria-expanded="false">
            <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span>
          </button> <a class="navbar-brand" href="#">Brand</a>
        </div>
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-6">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
          </ul>
        </div>
      </div>
    </nav>
    <a href="mmenu">Open Side Menu</a>
  </div>
  <div class="panel panel-default" style="padding-top: 70px">
    <div class="panel-heading">
      Hello there
    </div>
    <div class="panel-body">
      Some content!
    </div>
  </div>
  <a href="mmenu">Open Side Menu</a>
</div>
<nav id="mmenu">
                    <ul>
                      <li class="lb-purple"><span><i class="fa fa-dashboard"></i>Dashboards</span>
                        <ul>
                          <li><a href="index.html"><span>Corporate Dashboard</span></a></li>
                          <li><a href="index2.html"><span>Technical Dashboard</span></a></li>
                        </ul>
                      </li>
                      <li class="lb-blue"><span><i class="fa fa-desktop"></i>Interface</span>
                        <ul>
                          <li><span><i class="fa fa-cubes"></i>UI...

CSS

@import url('https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/css/extensions/jquery.mmenu.widescreen.css') screen and (min-width: 900px);
@import url('https://cdnjs.cloudflare.com/ajax/libs/jQuery.mmenu/5.3.1/css/jquery.mmenu.css');

JavaScript

$('#mmenu').mmenu({
  extensions: ["widescreen", "theme-dark", "bootstrap3"],
  slidingSubmenus: true
});