Laravel group the value by dividing the string from the database

I have a big data table in which i have to group the data from string eg.

131100580000 in this first number 13 is Unit Name , 11 is organization name , 0058 is machine name

and i have group the data as per unit name , organization,machine to draw the various graph. I am confused how should i do it?

i m using Laravel 5.4 .

via Chebli Mohamed