I believe he is saying he broke the PS2 connector on his keyboard cable.
Keyboard's are cheap. If your saying you broke the PS2 connector on the keyboard cable then buying another keyboard would be your only choice. If your saying your broke the PS2 port on the motherboard then like iss said, get a PS2->USB adapter and use your USB port to connect your keyboard.
Well, unless you have an extra PS2 keyboard lying around and you have the wiring skills to cut the existing one of and replace it with an extra, then your out of luck. Sorry hehe