你可以theme_{$post_type}_templates 并在末尾添加相同的“默认”选项：
add_action(\'theme_page_templates\', \'wpse_296283_theme_page_templates\');
function wpse_296283_theme_page_templates($post_templates){
$post_templates[\'default\'] = "Default Template";
return $post_templates;
}
然后用CSS隐藏第一个：
add_action(\'admin_head\' \'wpse_296283_admin_head\');
function wpse_296283_admin_head(){
?>
<style>#page_template option:first-child {display: none;}</style>
<?php
}
