Hi I need some advice because I'm a bit confused myself

Me and my son came to the UK with an EEA family permit..my husband is an Irish citizen but was born in the UK..he is thinking to apply for a British Citizenship and apply for a British passport but for him to have a British passport he was advised that he needs to surrender his Irish passport

If he applies for British citizenship will it affect our application for an EEA2 or residential permit?? Our EEA family permit will expire in March 2014..

We need to know what other options we have to lengthen our stay here in the UK

Thank you for those people who will reply to my post