Hayes has a twelve team no trade clause in his contract and he makes $7.1 million per season for the next three seasons after this one. So, it's not like Philadelphia can trade him anywhere. Additionally, they'd likely have to retain some salary in order to move him for future picks or prospects.
If Philadelphia retains salary, there could be some playoff teams that would want the big centreman in their lineup come playoff time. This could be the only way Hayes is moved out of Philadelphia with so many other NHL organizations near or above the salary cap.