Checklist links don't currently support relative links as "http://" is automatically prepended to whatever text is entered. Since inserting the PURL variable link doesn't work, there isn't a way to link the item to another page on the student's site without using relative links. Is there any way we could have that prepending behavior removed, so the text entered is the link that is used?
Solved:
use < a href="./tab_name" > (without the spaces)