In this example, the Father of the Bride is deceased and the Mother of the Bride is remarried. If the mother was deceased instead, you would list her first, above the living father (and step-mother if he was remarried). You can list them under the wedding party section in the following way:
Parents of the Bride
Mr. and Mrs. John William Doe
The Late Mr. Roger Smith
You can just list the living parent in the wedding party and put something under the dedication like this:
On this special day in our lives, we lovingly remember Mr. Roger Smith, Father of the Bride.
…or something like this..
The flowers on the altar are placed to the glory of God and in loving memory of Mr. Roger Smith, Father of the Bride.
The candle in the narthex burns brightly in loving memory of Mr. Roger Smith, Father of the Bride.