public static function renderWorkLog($id)
 {
     $vars = array();
     $vars['id'] = $id;
     $vars['log'] = '';
     date_default_timezone_set('Asia/Tokyo');
     $y = date('Y');
     $vars['year'] = Utils::generateNumSelect('year', $y - 1, $y + 1, $y);
     $vars['month'] = Utils::selectMonth('month', date('m'));
     $vars['day'] = Utils::generateNumSelect('day', 1, 31, date('d'));
     $a = ADB::getWorkLog($id);
     foreach ($a as $e) {
         if ($e['wdate'] == '' || $e['wdate'] == '0000-00-00') {
             $e['wdate'] = $e['ctime'];
         }
         $i = '<li>';
         $i .= '<span>' . $e['wdate'] . ' -- Team Leader: ' . $e['who'];
         $i .= ' -- Volunteers: ' . $e['volunteers'];
         $i .= ' - <a href="/worklog/' . $e['id'] . '">edit</a>';
         $i .= '</span>';
         $i .= '<div>' . nl2br($e['comment']) . '</div>';
         $i .= "</li>\n";
         $vars['log'] .= $i;
     }
     return Utils::at($vars, 'worklog');
 }