Please download the files here:http://wikisend.com/download/264974/projectWorking.zip
As you are aware, this stuff is somewhat out of my comfort zone. However, I have done my best for you and I think you will like it. At least there is now some functionality. Please feel free to modify the CSS in any way you want.
The files that you sent me included three SVG titles: "Biography", "Projects", and "Contact". Since I don't work with SVG, I used those and enabled them.
You will see that if you click on any of these items, the content fades in and the title changes/fades in.
So you can see that adding a new item is very simple. You would add the link, add the SVG title graphic, and add a case to the switch statement for this new item. Everything else is already set up and functional.
Feel free, of course, to change any of the functionality or styles. However, I think that it looks great and actually does something now.
Please remember to rate my answer. Thank you so much and have a wonderful evening!