The answer is quite simple: Contact hour *never* expire.
This means that your 35 contact hour certificate is always valid. No matter when you take your PMP exam.
However... you have studied training materials preparing you for the current PMP exam. I recommend that you take your exam before July 31st 2013, because the difference between the current exam (based on PMBOK 4) and the new exam (based on PMBOK 5) will be significant.
i already passed you final exam and i have 35 contact hours certificate. My question is can i used this certificate for applying PMP exam which is cover with PMBOK 5 edition? or i will take final exam again for new 35 contact hours.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®