Rihanna says her biggest parenting “hack” is dressing her sons like their rapper dad. The 36-year-old singer has sons RZA, 23 months, and Riot, eight months, with fellow performer A$AP Rocky, 35, and has now revealed she tries to save time by using their father’s style as inspiration for her boys’ clothes. She told Entertainment Tonight: “When I dress them, I always try to dress them like Rocky.” The singer admitted even though she’s “always” imagined “dressing a girl” she didn’t know what to do with boys when it came to their outfits. She added: “We all do as women, like, ‘Oh, I’m going to dr…