라디오 체크시 하단에 select옵션이 나오게 하려고 합니다.

// 상품 선택옵션function get_item_option_radio($it_id, $subject){    global $g5;    if(!$it_id || !$subject)        return '';        $str  = '';    $subj = explode(',', $subject);    $arr  = get_item_option_name($it_id, $subject);    $qty  = get_item_option_stock_qty($it_id);    $opt  = $arr[0]; // 소재데이터만    $size = $subj[1].':'.$arr[1][0]; // 사이즈수량    // 옵션선택목록 만들기    $opt_count = count($opt);    if($opt_count) {        $str .= '<tr>'.PHP_EOL;        $str .= '<th><label>'.trim($subj[0]).'</label></th>'.PHP_EOL;        for($k=0; $k<$opt_count; $k++) {            $j = $k + 1;            $opt_val = $opt[$k];            $qty_val = $qty[$k];            $checked = ($k==0) ? ' checked="checked"' : '';            if(strlen($opt_val)) {                $select .= '<label for="material'.$j.'" class="material"><input type="radio" name="material" id="material'.$j.'" value="'.$opt_val.'" onclick="opt_checked('.$j.')" data-key="'.$j.'" data-stock-qty="'.$qty_val.'" class="it_option" '.$checked.'> '.$opt_val.'</label>'.PHP_EOL;            }        }        $select .= '<input type="hidden" id="it_option_size" value="'.$size.'">';        $str .= '<td>'.$select.'</td>'.PHP_EOL;        $str .= '</tr>'.PHP_EOL;    }    return $str;}