I wrote this little Wordpress Plugin for the upcoming redesign of our website. It will help users to navigate quickly to a certain lesson.
Ajax Categories Posts Dropdown Download
Here is the general description:
Lists all categories in a dropdown box and after selecting one the second dropdown box gets populated via Ajax with all posts from this category. You can use this plugin as widget (with some options) or just add the function to display the two dropdown boxes somewhere in your template files.
