/커뮤니티 테마/layout/head_bs.html 파일에서 해당 부분을 주석 또는 삭제처리하시기 바랍니다.

<!--{? _is_member}-->
<div class="member-nav hidden-xs hidden-sm">
소스생략
</div>
<!--{/}-->

먼저 답변 고맙습니다.

아래 소스 삭제하면 되는지요?

일단 삭제하고 적용해보았는데 사이트 스크롤이 되지 않습니다.

어떤 문제일까요?

=========================================================================================
        <!--{? _is_member}-->
        <div class="member-nav hidden-xs hidden-sm">
        <div class="container">
        <div class="row">
        <section class="member-nav-info col-md-8">
<!--{? eyoomer.mb_photo}--><div class="member-nav-photo">{eyoomer.mb_photo}</div><!--{:}--><div class="member-nav-icon"><i class="fa fa-user"></i></div><!--{/}-->
<!--{? _level.gnu_icon}-->
<span style='display:inline-block;margin-right:2px;'><img src="{_level.gnu_icon}" align="absmiddle"></span>
<!--{/}-->
<!--{? _level.eyoom_icon}-->
<span style='display:inline-block;margin-right:2px;'><img src="{_level.eyoom_icon}" align="absmiddle"></span>
<!--{/}-->
<strong class="color-black">{eyoomer.mb_nick}</strong>님&nbsp;
[ <strong class="counter color-red">{=number_format(eyoomer.mb_point)}</strong><strong>P</strong> ]&nbsp;&nbsp;&nbsp;
<a href="{C.G5_BBS_URL}/logout.php" class="btn-e btn-e-xs btn-e-dark tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="로그아웃"><i class="fa fa-sign-out"></i></a>
<a href="{C.G5_URL}/mypage/config.php" class="btn-e btn-e-xs btn-e-light-grey tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="환경설정"><i class="fa fa-cog"></i></a>
<a href="{C.G5_URL}/mypage/activity.php" class="btn-e btn-e-xs btn-e-light-grey tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="활동기록"><i class="fa fa-bar-chart"></i></a>
<a href="{C.G5_URL}/mypage/?t=timeline" class="btn-e btn-e-xs btn-e-light-grey tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="내타임라인"><i class="fa fa-clock-o"></i></a>
<a href="{C.G5_URL}/mypage/?t=favorite" class="btn-e btn-e-xs btn-e-light-grey tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="관심게시판"><i class="fa fa-list-alt"></i></a>
<a href="{C.G5_URL}/mypage/?t=followinggul" class="btn-e btn-e-xs btn-e-light-grey tooltips" data-placement="bottom" data-toggle="tooltip" data-original-title="팔로윙글"><i class="fa fa-heart"></i></a>
            <span class="dropdown">
                <button type="button" class="btn-e btn-e-xs btn-e-dark dropdown-toggle my-menu" data-toggle="dropdown">추가메뉴 <i class="fa fa-caret-down"></i></button>
                <ul class="dropdown-menu" role="menu" style="margin-top:9px">
                <li><a href="{C.G5_BBS_URL}/respond.php">내글반응 <span class="badge badge-e rounded-2x">{respond}</span></a></li>
                    <li>
                    <a href="{C.G5_BBS_URL}/memo.php" target="_blank" id="ol_after_memo" class="win_memo">
                    쪽지 <span class="badge badge-e rounded-2x">{_memo_not_read}</span>
                    </a>
                    </li>
                    <li>
<a href="{C.G5_BBS_URL}/scrap.php" target="_blank" id="ol_after_scrap" class="win_scrap">스크랩</a>
                    </li>
                    <!--{? _is_admin == 'super' || _is_auth}-->
                    <li class="divider"></li>
                    <li><a href="{C.G5_ADMIN_URL}">관리자페이지</a></li>
                    <!--{/}-->
                </ul>
            </span>&nbsp;&nbsp;&nbsp;
<a href="{C.G5_URL}/mypage/friends.php" class="btn-e btn-e-xs btn-e-dark">맞팔친구 - <span style="color:#00ff00"><!--{? eyoomer.cnt_friends}-->{eyoomer.cnt_friends}<!--{:}-->0<!--{/}--></span></a>
<a href="{C.G5_URL}/mypage/follower.php" class="btn-e btn-e-xs btn-e-dark">팔로워 - <span style="color:#00ffff"><!--{? eyoomer.cnt_follower}-->{eyoomer.cnt_follower}<!--{:}-->0<!--{/}--></span></a>
<a href="{C.G5_URL}/mypage/following.php" class="btn-e btn-e-xs btn-e-dark">팔로윙 - <span style="color:#ffff00"><!--{? eyoomer.cnt_following}-->{eyoomer.cnt_following}<!--{:}-->0<!--{/}--></span></a>
</section>
<section class="member-nav-btns text-right col-md-4">
<a href="{C.G5_URL}/mypage/" class="btn-e btn-e-xs btn-e-dark"><i class="fa fa-child" style="color:#ff5500"></i> 마이페이지 </a>
<a href="{C.G5_URL}/?{member.mb_id}" class="btn-e btn-e-xs btn-e-dark"><i class="fa fa-home" style="color:#ff5500"></i> 마이홈</a>
</section>
        </div>
        </div>
    </div>
    <!--{/}-->
    </div>
    <!--{* End Header Nav *}-->
=========================================================================================

html 태그는 여는 태그와 닫는 태그가 존재합니다.
<div> </div> 와 같은 형태가 되어야 합니다.
위의 소스 중 닫는 태그까지 삭제한 것 같으니 확인 바랍니다.
</div>
<!--{* End Header Nav *}-->

감사합니다.

덕분에 해결했습니다!
고맙습니다^^