I like to do this job and i'll complete within few hrs.
I'll display your categories in A-z format properly and all new or edit categories will sort proerply.
I'll use advance technologies like, PHP5, MySQL, HTML5, CSS3, JS, Jquery, Ajax, and Bootstrap, as per required.
I'll give you 2 weeks free support in regards of this project
so let start discussion and start project, and thank you for reading