Before proceeding, you should probably first read the off-canvas menu tutorial.
Since we're trying to create some more advance menus now, lets include the "all" .js and .css files. This way we can use all extensions and add-ons without having to include the files separately.
<!DOCTYPE html>
<html>
<head>
<script src="path/to/jquery.js"></script>
<script src="path/to/jquery.mmenu.all.js"></script>
<link href="path/to/jquery.mmenu.all.css" rel="stylesheet" />
For more info on creating a webpage and including the needed .js and .css files, check out the off-canvas menu tutorial.
Next up:
The menu