Need help to switch animation value of different channels

[solead]

Hello,

I made a quick rig of a character for my friend, for him to be able to start animating, but I realised later that I tottaly forgot to give the good axis to my controlers.
That is why I would like to make a script to switch, for exmple the animation value of the channel rotate x to the channel rotate z and in return. Like that my friend wont have to redo all the animation he have already done in all his scenes.

I've tried to transfer the attribute to another objet and back to the new one but it's useless since I don't know how to transfer it to another channel

Thanks for your help 

[mahmoud-youssef]

How is the controllers linked to the skilton we can creat a script to recreate the constraints while switching the axies 
If You are using constraints i can creat the script for you 

[solead]

There is a parent constraint on the skeleton.
I've already reoriented the axis on the rig. The problem is since my friend is using my rig in reference, if I give him the last version of it with the reoriented axis all his animation will be mixed up.