chaomd/addons/third/view/hook/user_register_end.html

<style>.social-login {
    display: flex
}

.social-login a {
    flex: 1;
    margin: 0 2px;
}

.social-login a:first-child {
    margin-left: 0;
}

.social-login a:last-child {
    margin-right: 0;
}</style>

<div class="form-group social-login">
    {if in_array('wechat', $status)}
        <a class="btn btn-success" href="{:url('/third/connect/wechat')}?url={$url|urlencode}"><i class="fa fa-wechat"></i> 微信登录</a>
    {/if}
    {if in_array('qq', $status)}
        <a class="btn btn-info" href="{:url('/third/connect/qq')}?url={$url|urlencode}"><i class="fa fa-qq"></i> QQ登录</a>
    {/if}
    {if in_array('weibo', $status)}
        <a class="btn btn-danger" href="{:url('/third/connect/weibo')}?url={$url|urlencode}"><i class="fa fa-weibo"></i> 微博登录</a>
    {/if}
</div>