Help for this problem : Multiselect Field

Help for this problem : Multiselect Field

Hi, y have a form with a multichoice option, when it is complete i need separate options.

For example :

Field_1: x1;x2;x3;x4;x5

i need 5 new fields 

f1= x1,
f2=x2
f3=x3
f4=x4
f5=x5 

y try with getPrefix and getSuffix ,I need a script that works regardless of whether in the future add more options in the menu Multichoice.

Thanks and regards.