Sure! Here's the requested content in spun format with synonyms:
Candace Philip and Felix.
Cathy Finn, and also Foster.
Philip captures the love of Cara, and also Frank.
Candace finds joy in being with Phineas and Foster.
Fred is cherished by Candace, and also Foster.
Candy both Phineas and Ferb.
I hope you find these variations helpful!