url structure:
base_url/controllername/functionname
Remove controllername from url:
/application/config/routes.php
$route['default_controller'] = 'welcome';
$route['^(?!other|controller).*'] = 'welcome/$0';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;
Remove index.php from url:
create .htaccess file at root directory
Options +FollowSymlinks
RewriteEngine on
RewriteCond $1 !^(index\.php)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
