用户2587741在问题中发布了他们问题的答案:
$tabs_divs = \'\';
function tabs_group($atts, $content = null ) {
    global $tabs_divs;
    $tabs_divs = \'\';
    $output = \'<div id="tab-side-container"><ul\';
    $output.=\'>\'.do_shortcode($content).\'</ul>\';
    $output.= \'<div class="panel-container">\'.$tabs_divs.\'</div>\';
    return $output;  
}  
function tab($atts, $content = null) {  
    global $tabs_divs;
    extract(shortcode_atts(array(  
        \'id\' => \'\',
        \'title\' => \'\', 
    ), $atts));  
    if(empty($id))
        $id = \'side-tab\'.rand(100,999);
    $output = \'
        <li>
            <a href="#\'.$id.\'">\'.$title.\'</a>
        </li>
    \';
    $tabs_divs.= \'<div id="\'.$id.\'">\'.$content.\'</div>\';
    return $output;
}
add_shortcode(\'tabs\', \'tabs_group\');
add_shortcode(\'tab\', \'tab\');