<?php
    add_filter(\'get_sample_permalink_html\', \'my_hide_permalinks\');
    function my_hide_permalinks($in){
        global $post;
        if($post->post_type == \'my_post_type\')
            $out = preg_replace(\'~<div id="edit-slug-box".*</div>~Ui\', \'\', $in);
        return $out;
    }

如果只想删除永久链接，请更换包含以下内容的行preg_replace 具有

$out = preg_replace(\'~<span id="sample-permalink".*</span>~Ui\', \'\', $in);

以下是经过更新和测试的代码：

add_filter(\'get_sample_permalink_html\', \'my_hide_permalinks\', 10, 5);

function my_hide_permalinks($return, $post_id, $new_title, $new_slug, $post)
{
    if($post->post_type == \'my_post_type\') {
        return \'\';
    }
    return $return;
}