I've read every single topic related to this issue, and I have tried every single possible solution but to no avail. It seems to me anything working doesn't apply to the latest version of P2. I have even tried old solutions for older versions of P2 (such as the one provided by omarvelous, but this one didn't work the ajax and replies didn't work).
I need for users to be able to choose from a dropdown categories list the one that fits best with their post. I've added the dropdown successfully but I'm not able to get it to record the category. I've tried hacking the ajax and functions files, as suggested in other related topics, but still no success.
I would greatly appreciate it if anyone could tell me how to get P2 1.1.3 to record post categories when selected from a dropdown list.
Thank you very much, in advance. I've been going crazy with this for many days now.