I think you have to make frozen yogurt like the bought kind in an ice cream freezer, however, you could try these:
Yogurt Pops
INGREDIENTS
80 g sugar-free lemon-flavored drink mix
225 g strawberry cheesecake flavored yogurt
DIRECTIONS
Prepare drink mix according to package directions. Combine with yogurt. Pour into ice pop molds and freeze until firm.
No Drip Ice Pops
INGREDIENTS
235 ml boiling water
1 (3 ounce) package fruit flavor gelatin mix-Jello
1 banana
235 ml plain yogurt
DIRECTIONS
Combine boiling water and gelatin in a blender and pulse until gelatin is dissolved. Blend in banana until smooth, then blend in yogurt. Pour mixture into popsicle molds or small, plastic drinking cups and freeze until hard. (If using drinking cups, freeze until firm, insert popsicle sticks, then freeze completely.)