I have following structure of my project
/system
/applications
/cache
/core
/helpers
/hook
/language
/libraries
/logs
/third_party
/admin-p
Open config.php from system/application/config directory
and replace
$config['index_page'] = “index.php” by $config['index_page'] = “”
Create a “.htaccess” file in the root of CodeIgniter directory
and add the following lines.
RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]
In some case the default setting for uri_protocol does not work properly.
To solve this problem just replace
`$config['uri_protocol'] = “AUTO”`
by
$config['uri_protocol'] = “REQUEST_URI”
from system/application/config/config.php