Hello Shashi,
I'm sorry to hear that you're having problems with Filter options in Moodle 2.5. Can you please provide more details about which filter your option you're talking about? Can you provide a URL? We need specific information in order to clearly investigate the issue, please. Checkout this link for documentation on the current version 2.5 filters: Managing Filters in version 2.5.
Please help clarify the question, and we will be happy to look into the issue for you.
Kindest Regards,
Arnel C.