If a player is injured it's for him to say he can't carry on, if Wilshere said he could how was Hodgson to know he was injured? When a player goes down the player usually makes the call as to whether he's able to carry on, unless he clearly can't.
Hodgson wouldn't have left him on if he knew he was injured, why would he?
Its the refs fault
Arsene Wenger, the only football manager that got paid 8 million quid to do nothing but sit on his arse..