PHILADELPHIA — The NCAA asked a federal appeals court on Wednesday to reject a legal effort to make colleges treat Division I athletes like employees and start paying them an hourly wage.Lawyers for the student-athletes said that weekly, they often spend 30 hours or more on their sport and often need money for expenses, even if they are on full scholarship. And they believe the athletes deserve a share in the millions that are spent on coaches, college administrators and facilities — and the billions that …