Codeigniter分页创建上一个和下一个链接

我尝试在CI 中创建分页

我有HTML

<!--div class="pagination">
<a href="#" class="page-prev">previous</a>
<ul>
    <li class="active"><a href="#">1</a></li>
    <li><a href="#">2</a></li>
    <li><a href="#">3</a></li>
    <li><a href="#">4</a></li>
</ul>
<a href="#" class="page-next">next</a>

在我的控制器中，我尝试这个

        $config['full_tag_open'] = '<div class="pagination"><ul>';
        $config['full_tag_close'] = '</ul></div>';
        $config['cur_tag_open'] = '<li class="active">';
        $config['cur_tag_close'] = '</li>';
        $config['num_tag_open'] = '<li>';
        $config['num_tag_close'] = '</li>';
        $config['next_link'] = '';
        $config['prev_link'] = '<';
        $config['next_tag_open'] = '';
        $config['next_tag_close'] = '';
        $config['prev_tag_open'] = '';
        $config['prev_tag_close'] = '';

如何将prevlink和nextlink放在ul之外？如果我打开的完整标签必须是（如果我没有错的话）标签ul