oi vey.....ok, i shall explain this once more!
her origin is not "resurrection by cats," her origin is a bit complicated.
Selina Kyle as we see her early in the film is mousy, repressed, and demure, adhearing to all the stereotypes that dominate feminity. her house is pink, it's full of cutesy things, and it's all very girly. once she begins to discover dark things about her boss, the emergence of a new personality is being created. when he shoves her out the window the old Selina is dying, and the new Selina is being born. tough, sexual, dominant, fierce - Catwoman as we know her to be for the rest of the film is being born as Selina falls through one canopy after another. by the time she hits the ground, she's only metaphorically died, not literally. she takes on the persona of a cat for two reasons: it's the first thing she sees when she reawakens with her new persona, and because it is the symbol of the person who 'killed' the old version of her.
throughout the rest of the movie the two personalities are clashing for dominance in her mind, with the end being that Catwoman wins out and Selina Kyle as we knew her is no more.