public function __construct($cssClass = '', $useCssPrefix = true) { parent::__construct(); $this->flatten = false; $this->useCssPrefix = $useCssPrefix; $this->cssClass = $cssClass; if ($useCssPrefix) { $this->headerCssClassPrefix = 'nav-header'; $this->linkCssClassPrefix = 'nav-link'; $this->dropdownCssClassPrefix = 'nav-dropdown'; $this->dividerCssClassPrefix = 'divider'; } }