Can you run them under the carpet, and cut a very small pinhole to come out where the speakers are?
If no carpet, then you can try these two things:
1.) Run speaker wire through your walls and make a socket connector, you can buy the parts at Radio Shack.
2.) Go wireless. Install wireless receiver/amplifiers on or near your speakers and run electric wires to your outlet for power. This can also be bought at or through Radio Shack.