Hello
Try using your Clone/Stamp tool (in left hand menu).
Select a brush size, Hold the ALT key down & select a part of the picture that will
blend into the background & click over the object you want to hide.
Its a bit hard to explain, when I don't know how much you know about Photoshop.
If you need help, I am more than happy to be of service.
Photoshop is one of my hobbies & I warn you it can become an addiction LOL
Sharon