首先设置参数（设置）

 $args = array(
        \'post_parent\' => get_the_ID(),
        \'post_type\'   => \'page\',
        \'numberposts\' => -1,
        \'post_status\' => \'publish\'
    );

    $children = get_children( $args, $output ); 

<?php if (!empty($children)):?>
    <ul class="row">
        <?php foreach($children as $dest){
            $permalink = get_permalink($dest->ID);
            echo "<li class=\'col-sm-4\'><a href=\'{$permalink}\'>" . $dest->post_title . "</li>";
        }?>
    </ul>
<?php endif;?>