lithium\template\helper\Form::_selectOptions PHP Method

    protected function _selectOptions(array $list, array $scope)
    {
        $result = "";
        foreach ($list as $value => $title) {
            if (is_array($title)) {
                $label = $value;
                $options = array();
                $raw = $this->_selectOptions($title, $scope);
                $params = compact('label', 'options', 'raw');
                $result .= $this->_render('select', 'option-group', $params);
                continue;
            }
            $selected = is_array($scope['value']) && in_array($value, $scope['value']) || $scope['empty'] && empty($scope['value']) && $value === '' || is_scalar($scope['value']) && (string) $scope['value'] === (string) $value;
            $options = $selected ? array('selected' => true) : array();
            $params = compact('value', 'title', 'options');
            $result .= $this->_render('select', 'select-option', $params);
        }
        return $result;
    }