File: htdocs/themes/xbootstrap5/modules/newbb4/newbb_viewforum_subforum.tpl

<a title="<{$smarty.const._MD_SUBFORUMS}>" data-bs-toggle="collapse" href="#xoops-subforum" class="btn btn-primary pull-right">
    <span class="fa-solid fa-circle-plus"></span> <{$smarty.const._MD_SUBFORUMS}>
</a>
<div class="newbb-subforum mb10 clearfix">
    <div class="collapse" id="xoops-subforum">
        <{foreach item=sforum from=$subforum|default:null}>
        <ul class="subforum-loop list-unstyled clearfix">
            <li class="col-12 col-md-6">
                <a href="<{$xoops_url}>/modules/<{$xoops_dirname}>/viewforum.php?forum=<{$sforum.forum_id}>" title="<{$sforum.forum_name}>">
                    <{$sforum.forum_folder}> <strong><{$sforum.forum_name}></strong>
                </a>
            </li>

            <li class="col-12 col-md-6 text-end">
                <strong><{$smarty.const._MD_LASTPOST}>:</strong>
                <{$sforum.forum_lastpost_time}> <strong><{$smarty.const._MD_BY}></strong> <{$sforum.forum_lastpost_user}>
            </li>

            <li>
                <ul class="list-inline col-md-6 hidden-xs">
                    <{if $sforum.forum_moderators}>
                        <li><span class="label label-info"><{$smarty.const._MD_MODERATOR}>: <{$sforum.forum_moderators}></span></li><{/if}>

                    <li><span class="label label-info"><{$smarty.const._MD_TOPICS}>: <{$sforum.forum_topics}></span></li>

                    <li><span class="label label-info"><{$smarty.const._MD_POSTS}>: <{$sforum.forum_posts}></span></li>

                    <!-- If subforum description -->
                    <{if $sforum.forum_desc|default:'' != ''}>
                        <li>
                            <button class="btn btn-sm btn-info" data-bs-toggle="modal" data-bs-target="#subforum-<{$sforum.forum_id}>">
                                <span class="fa-solid fa-circle-info"></span>
                            </button>
                        </li>
                    <{/if}>
                </ul>

                <ul class="list-inline col-md-6 text-end">
                    <{if $sforum.forum_lastpost_subject}>
                        <li>
                            <a href="<{$xoops_url}>/modules/<{$xoops_dirname}>/viewtopic.php?post_id=<{$sforum.forum_lastpost_id}>">
                                <{$sforum.forum_lastpost_subject}>
                                <{$sforum.forum_lastpost_icon}>
                            </a>
                        </li>
                    <{else}>
                        <li><{$smarty.const._MD_NONEWPOSTS}></li>
                    <{/if}>
                </ul>
            </li>

        </ul><!-- .subforum-loop -->

        <!-- Modal -->
        <div class="modal fade" id="subforum-<{$sforum.forum_id}>" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <button type="button" class="close" data-bs-dismiss="modal"><span aria-hidden="true">&times;</span><span class="visually-hidden">Close</span></button>
                        <h4 class="modal-title"><{$sforum.forum_name}></h4>
                    </div>
                    <div class="modal-body">
                        <p><{$sforum.forum_desc}></p>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal"><{$smarty.const.THEME_CLOSE}></button>
                        <button type="button" class="btn btn-primary"><{$smarty.const.THEME_GOTOTHEFORUM}></button>
                    </div>
                </div><!-- /.modal-content -->
            </div><!-- /.modal-dialog -->
        </div><!-- /.modal -->

        <{/foreach}>
    </div><!-- #xoops-subforum -->
</div><!-- .xoops-newbb-subforum -->