To see a panther in your dream, signifies lurking danger and enemies working to do you harm. It represents darkness, death, and rebirth. On a more positive note, panthers signify power, beauty and/or grace. Consider the feel of your dream to determine which meaning applies.
To see a tiger in your dream, represents power and your ability to exert it in various situations. The dream may also indicate that you need to take more of a leadership role. Alternatively, the tiger represents female sexuality, aggression, and seduction.
To see a lion in your dream, symbolizes great strength, courage, aggression and power. You will overcome some of your emotional difficulties. As king of the jungle, the lion also represents dignity, royalty, leadership, pride and domination. You have much influence over others. You also need to exercise some restraint in your own personal and social life.
Since all three were in your dream at the same time - it's probably a combined meaning of all three.
Hope that helps! :)