The way codepen works visually hides the hash from the url bar, but you should be able to copy and paste the code elsewhere and see it working (assuming jQuery was loaded). The functionality works fine other than that.

The plugin is very simple, just click on the color tabs above. To use you just call it on the nav ul element, and it listens for the 'hashgange' event. Then it loads the corresponding section (if it exists). If there is no hash it switches to a default view. You can pass an object to it changing the defaults, such as setting a home hash which it will automatically load.