Yes, once her name in the passport is changed, she needs to apply for a new BRP card within 3 months. She will do all the biometrics process again. The cost of the application fee is £38 plus the fee in the post office (I think around £19). She can only do the BRP replacement application via post.

Here is the form. http://www.ukba.homeoffice.gov.uk/si...brp1020091.pdf