Afternoon SitePointers,

Just wondering if some helpful soul can tell me what is used to make this happen. I want to create something similar where a user clicks an option, which in turn generates more options so they can work though faults to find a solution.

From looking at it, I guess I need to create a database and pull the info through using PHP once the user has clicked. I'm a little stuck when trying to find where to look on Google as I'm not sure what that particular 'design' is called!

I know I could make this work just by creating static HTML pages, but that would end up in me creating literally thousands of pages which isn't really feasible,

Any help would be appreciated,