I just wanted to see if codine can show as oxocodone in a urine sample?

Either one requires a prescription to use... if you have a prescriptionm and don't have a court ordering you NOT to use it... simply producing your prescription will preclude failing a test for it.

Morphine, heroin, codeine, oxycodone - all related. Oxycodone is only semi-synthetic, but it doesn't matter in the urine.