dpot-backend/Admin/Pages/Config/Basic/_navTabs.cshtml

<ul class="nav nav-tabs">
    <li class="nav-item">
        <a class="nav-link @Html.IsActive("/Config/Basic/Index")" asp-page="/Config/Basic/Index">기본</a>
    </li>
    <li class="nav-item">
        <a class="nav-link @Html.IsActive("/Config/Basic/Images")" asp-page="/Config/Basic/Images">이미지</a>
    </li>
</ul>