I will like to say that I have use google before posting this question.
I do have 5.8ghz 8 band,5inch screen, and PS3.
Is there any way to get 5.8ghz band signal from PS3 (I doubt)
No, it won't work: video feed is digital 2.4GHz, your receiver (if it's a typical FPV system) is 5.8GHz analog.
And, for the record, it's P3S as in Phantom 3 Standard, not PS3 (PlayStation 3)