instead of
in place of
in lieu of
In the place of; in substitution for; in preference to; rather than.
I wore mittens instead of gloves.
The grown-ups had coffee but the children wanted milk in place of coffee.
The boys went fishing instead of going to school.
The Vice-President talked at the meeting in place of the President, because the President was sick.
The magician appeared on the program in lieu of a singer.