I want to suggest you one of the best lawyer service provider provider in Singapore which is helplinelaw.com and reference list is http://www.helplinelaw.com/lawyers/singapore/singapore. You can find Business lawyer, Immigration Lawyer, Civil Lawyer, Family Lawyer etc.
So you setup that website to earn money like a directory service, advertising legal services?
Take note that the advertising of professional services are subject to law. You may want to check out carefully if your business activity is legal.