<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^/(stats|failed_auth\.html).*$ [NC]
RewriteRule . - [L]
</IfModule>

RewriteEngine on 
RewriteCond $1 !^(index\.php|resources|images|css|js|robots\.txt|favicon\.ico) 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d 
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]
RewriteCond %{QUERY_STRING} .
RewriteRule ^$ /? [L]