<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond $1 !^(index\.php|images|assets|doc|data|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>