public static function getInstance(array $userSettings = array())
    {
        if (!self::$instance) {
            self::$instance = new self($userSettings);
        }
        
        return self::$instance;
    }
public static function getInstance(array $userSettings = array())
    {
        if (!self::$instance) {
            self::$instance = new self($userSettings);
        }
        
        return self::$instance;
    }
public static function getInstance ( array $ userSettings = array ( ) ) { if ( ! self :: $ instance ) { self :: $ instance = new self ( $ userSettings ) ; } return self :: $ instance ; }
Get instance of MVC

@param array $userSettings
@return MVC
Get instance of MVC