Auto Collapse default

Code 
<script src="metisMenu.js"></script>
<script>
  $(function () {
    $('#menu').metisMenu();
  });
</script>

No Collapse

Code 
<script src="metisMenu.js"></script>
<script>
  $(function () {
    $('#menu2').metisMenu({ toggle: false });
  });
</script>

Double Tap To Go

Code

RTL SUPPORT RTL

Code 
<body dir="rtl">
...
<script src="metisMenu.js"></script>
<script>
  $(function () {
    $('#menu4').metisMenu();
  });
</script>