Try the following
Open config.php and do following replaces
$config['index_page'] = "index.php"
to
$config['index_page'] = ""
In some cases the default setting for uri_protocol does not work properly. Just replace
$config['uri_protocol'] ="AUTO"
by
$config['uri_protocol'] = "REQUEST_URI"
.htaccess
RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]
Note: .htaccess code vary depending on hosting server. In some hosting server (e.g.: Godaddy) need to use an extra ? in the last line of above code. The following line will be replaced with last line in applicable case:
// Replace last .htaccess line with this line RewriteRule ^(.*)$ index.php?/$1 [L,QSA]