What is the procedure to get the dependent visa for UK

Depends on different factors. In general it is a simple process in most cases it would have been easer if you had applied as a family i.e. when you got your work visa.
But the British Immigration service is one of the most friendly in the world.

Please visit UK Border Agency Visa Services Home Page (http://www.ukvisas.gov.uk/en/) and follow there prompts if you need any more assistance I will try and help