I have a premature daughter that was born in 2008 she was born in Cleveland , OH we now live in Philadelphia , PA can we still sue the hospital

Yes, the fact that you have moved has no bearing on whether you may bring a lawsuit. Because your daughter is still a minor, you may still file suit on her behalf for medical negligence regarding her birth in Ohio and, potentially because of diversity of citizenship (you now reside in Pennsylvania and the hospital is in Ohio), in district court in Pennsylvania.