Rotating column values in a table in clockwise direction

I have a table like this 
   c1   c2  c3
    1   2   3
    4   5   6
    7   8   9

I need output like this......       
    c1  c2  c3
    9   1   2
    3   4   5
    6   7   8

I tried but i didn't get any idea if anyone knows the answer please add some explanation for that answer .........