File: htdocs/themes/xbootstrap/modules/system/blocks/system_block_newusers.tpl

<{foreach item=user from=$block.users}>
    <ul class="userblock list-unstyled">
        <{if $user.avatar != ""}>
            <li class="avatar-image"><img src="<{$user.avatar}>" alt="<{$user.name}>" class="img-circle"></li>
        <{else}>
            <li class="avatar-image"><img src="<{$xoops_imageurl}>images/blank.gif" alt="<{$user.name}>" class="img-circle"></li>
        <{/if}>

        <li class="user-name"><a href="<{$xoops_url}>/userinfo.php?uid=<{$user.id}>" title="<{$user.name}>"><{$user.name}></a></li>

        <li class="join-date text-right hidden-sm join-date"><{$user.joindate}></li>
    </ul>
<{/foreach}>