Using the credit line to pay credit cards?

a friend of mine told me that i could ask a bank to release my credit line money as cash to my checking account. i think the rate is like 7%. in this case wouldnt be smart to pay off my credit card debt which is at 19% with my credit line money? any hidden traps here?
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1. Check for any extra fees or annual charges the bank may impose. 2. If I understand what you want to do you are replacing an unsecured loan, albeit at a lower rate, with a loan backed by your house, 3. The real trap is that you probably will continue to use the cards thereby running up a new balance while still having the original loan due.