CI: remove index.php from URLs

.htaccess

# Aditionally set the $config['index_page'] var in config file to blank
# so you avoid the index.php in URL helper functions like site_url() or base_url()

DirectoryIndex index.php

RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.php|robots\.txt)

RewriteRule ^(.*)$ index.php?/$1 [L]