1) Write anything on forum posts that you want to make clickable , like in transfer ads you want to provide a player link , write his name like
2)Now select the full name and while text is selected , click on fourth icon from right end of top of you post . It's a chain icon with + on below . It will open a new small window .In the URL section paste the URL of the player and click on submit . E.g copy this url
http://hitwicket.com/player/show/13888 in URL of that window and click on submit.