511489 php & ajax

my site home page has four main sections. each section has its own set of "next" "previous" and so fourths.... I want each section to have same navigation without refreshing the page with the use of ajax or some other method just as long as the final script is pure php as it will run in a CMS I will provide you with the code that i currently have and i also will provide you a mysql if necessary. Please only bid if you can complete this project in a timely manner. Please dont overbid as your bid will be ignored and removed.