where('layer', $layer); if ($parent_id > 0) { $model->where('parent_id', $parent_id); } $_data = $model->get(); if ($_data) { $data = array(); foreach ($_data as $k => $v) { $selected = ($id == $v['id']) ? ' selected' : ''; $data[] = ''.$v['name'].''; } } echo join("\n", $data); exit; } }