.htaccess

[eluser]hot_sauce[/eluser]
project: www/codeigniter/ ex. http://localhost/codeigniter/
htaccess
Options +FollowSymLinks
Options -Indexes
RewriteEngine On
RewriteBase /codeigniter/

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteCond $1 !^(index\.php)
RewriteRule ^(.*)$ index.php [L]

application/config/config.php file
$config['base_url'] = 'http://localhost/codeigniter/';
$config['index_page'] = '';
$config['uri_protocol'] = 'AUTO';
$config['enable_query_strings'] = FALSE;