Codeigniter best script to start paid or not

Hi , I have developed a CI app for about 3 years ago and now I want a new start for it . I'm looking for a paid or not script that will help me start with the best standards. Most important things for me is secure login , ajax , user roles , jquery/bootstrap . It would be great if this app included ajax datatables , form builder. Basically I want and admin theme , but coded with CI . Looked everywhere , only found obsolete scripts . The best one I found and have worked with is SMA ( Stock manager advance) from envato and there is potential there but the code is kind of a mess .
My current app looks great , but in terms of scale is not great .
I want to start a CI app from a script with the best practices .
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