My ps3 controller's x and o buttons are swapped. how do i change it back?

May be...

on my ps3, i have o as the enter button instead of the x button. i don't know how to change it back

It sounds like you got the asian version of the PS3. Sorry, there is no possible way

??? That's crazy, never heard of that. I have no clue but i would read the manual, it is full of usefull info...good luck

That means you've got an Asian version. My PS2 was like that. There is no way to change it on PS2 or PS3.