Rewrite pure php ajax script column csv mapping to our csv import script CodeIgniter 3

#####Please view the video first carefully before adding a proposal for what effect we want to achieve. #####


We have ready and working import CSV script in CodeIgniter3


We have ready and working import CSV with column mapping in PURE PHP and AJAX.

We need rewrite script FOR column mapping to our ready CodeIgniter 3 import csv.

Please check movie how this works: https://streamable.com/rzb9gt