In many cases your web logs can provide you that information. I would start there, as there is other information in your logs you might find useful as well.
To track links you can use a PHP script. You should be able to see the stats for internal pages using something like Google analytics. If you want to track how many times a link is clicked on, for example going to an external site I would use a PHP click tracking script. I have a very basic script I put together to do this for some of my sites by storing the click info in a mySQL database. If you do a search for PHP click tracking you will find loads.