which route from Panda hotel in kowloon to kowloon city area/shopping?

Well, do you refer to Kowloon City Plaza?
If yes, from the hotel, there is no direct public transportation. Thus you are adviced to take bus no.40 at Tai Wo Hau Railway Station, get off at Mei Foo Railway Station. Then transfer to bus no.42 to get to Hau Wong Road. After arriving, walk north along 350 yards to find the destination. The whole way takes around 50 mins. It costs 15.2 HKD per person.