CAllMain::AddPanelButtonMenu

public function AddPanelButtonMenu($button_id, $arMenuItem)
{
	if(isset($this->arPanelButtons[$button_id]))
	{
		if(!isset($this->arPanelButtons[$button_id]['MENU']))
			$this->arPanelButtons[$button_id]['MENU'] = array();
		$this->arPanelButtons[$button_id]['MENU'][] = $arMenuItem;
	}
	else
	{
		if(!isset($this->arPanelFutureButtons[$button_id]))
			$this->arPanelFutureButtons[$button_id] = array();

		$this->arPanelFutureButtons[$button_id][] = $arMenuItem;
	}
}