Firstly I hope I'm not posting this on the wrong forum. If I am, please change it to relevant category.
Secondly, I have a Sports website and its on multiple sports. I want to have a functionality where I could specify multiple category types than the regular options. Something like this (I've seen it in use on another sport website but I don't know how to get it to work for me) - https://dl.dropbox.com/u/5083532/screenshot.JPG
Thank you :)