bbs/write.php 

263라인 

function get_category_option1($bo_table='', $ca_name='')
{
    global $g5, $board, $is_admin;

    $categories = explode("|", $board['bo_category_list'].($is_admin?"|공지":"")); // 구분자가 | 로 되어 있음
    $str = "";
    for ($i=0; $i<count($categories); $i++) {
        $category = trim($categories[$i]);
        if (!$category) continue;

        $str .= "<label class='radio'><input type=\"radio\" name=\"ca_name\" value=\"$categories[$i]\" ";
        if($i==0) $str .= ' checked';
        if ($category == $ca_name) {
            $str .= ' checked';
        }
        $str .= ">  $categories[$i]     </label>";
    }

    return $str;
}
$category_option1 = '';
if ($board['bo_use_category']) {
    $ca_name = "";
    if (isset($write['ca_name']))
        $ca_name = $write['ca_name'];
    $category_option1 = get_category_option1($bo_table, $ca_name);
    $is_category = true;
}

write.skin.php 

<?php if ($is_category) { echo $category_option1;}?>