Do you have hacked consoles on both counts, or at least a hacked PS3? Does the game also have a PC version?
It should be technically possible and there may well be game specific conversion tools out there. Certainly I have seen people hack the PC versions and apply the logic to the console saves for hacking purposes.
Realistically though you are not going to have a one click converter, or even a "here is my console ID number and profile number, please help convert it" situation in the generic sense.
Equally you are probably far better off figuring out some cheats or hacking the save as a cheater might.
Short version. No.