게시판 list.skin 출력시 공지사항 글이 빨간색상 굵게 표기되게 하려고 하는데요

어느부분 수정해야 할까요?  

<tr class="<?php if ($list[$i]['is_notice']) echo "bo_notice"; ?>">
                                <td class="td_num co-1">
                                    <?php
                                    if ($list[$i]['is_notice']) { // 공지사항
                                        echo '<strong>공지</strong>';
                                    } else if ($wr_id == $list[$i]['wr_id']) {
                                        echo "<span class=\"bo_current\">열람중</span>";
                                    } else {
                                        echo $list[$i]['num'];
                                    }
                                    ?>
                                </td>
                                <?php if ($is_checkbox) { ?>
                                    <td class="td_chk co-2">
                                        <label for="chk_wr_id_<?php echo $i ?>" class="sound_only"><?php echo $list[$i]['subject'] ?></label>
                                        <input type="checkbox" name="chk_wr_id[]" value="<?php echo $list[$i]['wr_id'] ?>" id="chk_wr_id_<?php echo $i ?>">
                                    </td>
                                <?php } ?>