Auto Collapse default

Code 
<script>
  $(function () {

      $('#menu1').metisMenu();

  });
</script>


Download CSS File

No Collapse

Code 
<script>
  $(function () {

      $('#menu2').metisMenu({ toggle: false });

  });
</script>

RTL SUPPORT RTL

Code 
<body dir="rtl">
...
<script>
  $(function () {

      $('#menu3').metisMenu();

  });
</script>