How do is populated the selected part of the multiselect in the order I want?

How do is populated the selected part of the multiselect in the order I want?

I save the order of the selected items in a database but when i call the selected items for adjustements I can't recall the selected order.
How do is populated the selected part in the order I want?
list is for example
A
B
C
and I saved
C
B
in that order.
When I call that order back it displays
B
C
and not
C
B.
Can anybody help me with this problem?