Twice loading config's files

Hello, help please

1. We traced php process which works on Code Igniter and we get data:
access("/var/www/name.com/apps_files/config/config.php", F_OK) = 0
access("/var/www/name.com/apps_files/config/production/config.php", F_OK) = -1 ENOENT (No such file or directory)

2. We fix it and created symlink /production/config.php to /config/config.php and look: is it will enought if it will find file from first time and we get next data
access("/var/www/name.com/apps_files/config/config.php", F_OK) = 0
access("/var/www/name.com/apps_files/config/production/config.php", F_OK) = 0

 Problem that core CI load twice same config file, how we can fix it?