I would like to apologize if this is a million time asked question but I haven't fund my solution yet.
I have a website (build with wordpress), and I would like to change the link structure for logged in users.
For example, If a url is like this http://www.example.com/sample-page , I would like it to be http://www.example.com/sample-page?user_id for logged in users.
Thank you in advance for your time!
