the cat injured after fighting with two dogs

Cats can be seriously injured by dog attacks. It is important that you act promptly to increase her chances of surviving and recovering from their injuries. Do not worry if you are not able to treat the injuries—that will be the veterinarian's job. Keeping their safety in mind, as well as your own, do your best to provide some initial care and get them to the veterinary hospital as soon as possible.

Separate the dog from the cat. If you see the cat being attacked by the dog, you must act quickly to break up the fight. Keep your own safety in mind as you do this—the dog may end up injuring you, too. If you have a leash (or are near your home where you can run quickly and get one), approach the dog quietly and wrap the leash around his back end.
Aim for an area close to his hips.
Thread the free end of the leash through the leash's handle and pull back forcefully to make the leash taut around the dog's body.
Back the dog away from the cat and tie the leash to the nearest sturdy structure, such as a telephone pole. Be mindful that the dog will still be in 'fight' mode.
If you are uncomfortable breaking up the fight on your own, find someone nearby who can assist you.
Check the dog's collar for an ID tag. If you see the owner's information, contact the owner to come get the dog. If you don't see identification, call your local animal control