I am completely at a loss on how to implement this with my WordPress site. Can someone please point me in the right direction on how to go about doing this?
Not sure if that ‘s what you are after but you may try either Collapsible Elements or Collapsing Objects plugins. Both of them lets you expand/collapse elements in a page or post.
You could use my flex accordion to get this effect. Right now it generates a navigation, but you could make it display pages and/or posts with a little php knowledge.