customised the business directory

hi i just started a business directory web site and want to customized it www.weblisting.com.au. also site must be seo friendly. so if any one can help me with matter . it will be appreciable basically i need php coder . i need my new listing to be in front page as little link, also category should be middle of teh site as a tab. but these should create by itself , when ever i create category or new listing. so it si simple think if you know what your doing so let me know your price