It sounds like your MacBook Pro charger is fraying or damaged and you want to know what options you have. Take a look at the following information from the article named:
Mac notebooks: Reducing cable strain on your MagSafe power adapter
Whether your product is in or out-of-warranty, you can take your adapter (you don't need to take the computer, however please do bring the computer's serial number) to an Apple-Authorized Service Provider or Apple Retail Store for evaluation and replacement if necessary. You may be eligible for a replacement adapter free of charge. Make a reservation at the Genius Bar before visiting your local Apple Retail Store. To make a reservation, go tohttp://www.apple.com/retail/geniusbar/ (available in some countries only).
The article also has some great information about how to reduce strain on the cables coming from the adapter as well to help prolong the life of your charger.
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