Depends. If I detest them because they are a bad influence or make bad choices, I would explain to my daughter that I do not want her associating with them.
If I dislike them simply because I dislike them and we do not get along or see eye to eye, but they have done nothing to warrant suspicion and they get along well with my daughter, then I would endure it because it makes my daughter happy.
You're not going to like every single person you meet, and your child is not going to like and dislike the same people that you like and dislike. It is just a matter of whether or not your child is protected and whether or not they are a good influence.