Try po to read previous forum that might be helpful

http://www.qatarliving.com/group/filipino-expatriates-in-qatar

as far as I know you need the following:
Original Passport of you and Hubby/Pataka
NBI Clearance - Authenticated
Certificate or NOC from company
2pcs Passport photo
Marriage Certificate - Authenticated
Application Form
Medical Certificate

or better yet visit
http://english.mofa.gov.qa/
http://portal.www.gov.qa/wps/portal/services

Hope above help: