since i want to separate the frontend and backend of the system. i have created 2 folders inside controllers as frontend and backend

Below is the structure of my controller folder

controller
 --frontend
   ---store.php
   ---processing.php
   ---profile.php
   ---authenticate.php
   ---register.php 

 --backend
   ---authenticate.php
   ---stats.php
   ---users.php
   ---property_manage.php
   ---register.php 

i can access the functions by using

frontend/store/add
frontend/store/manage
......

backend/stats/sales
backend/stats/payments
.....

but i want to take off the frontend and the backend segments from the url.

I checked the routing feature in codeigniter but according to my knowledge i need to individually specify each route. Since i have about 12 controllers and each has around 10 -15 functions i might have to specify each and every function to the route.

is there any other efficient way to achieve using routing or any other way? (without using any htaccess)

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