I don't even know what to call this feature. Here's a website that shows the problem:
http://pulse.audiusanews.com/pulse/index.php Notice that you can end up in a situation where there are no results. For example, in order, press: People, Performance, Technology, Photos. The client wants it so that when you click a button, it disables buttons that would lead to a dead end. In other words, after clicking Technology, the Photos button would be disabled. Can Solr help with this? -jsd-
