Problem with code developed with XAMPP on LAMP

I have developed a software using XAMPP, CodeIgniter, HTML, CSS, JavaScript, PHP, MySQL, JQuery, AJAX. For uploading it on to a website I purchased a website on GoDaddy. There I am facing problems. When contacted with the website support, I was told that for shared website they have LAMP only. Now, for making it functional I need to convert the entire system for working on LAMP. Actually, as per my understanding both XAMP & LAMP have Apache, MySQL & PHP engine. But, as of now it is giving problems. 

Need help, request to suggest on what all I need to work on in above case to arrive at a solution?