从函数中删除“catergories”字符串

How can I remove the "category" string from this function.

function display_category_list($atts) {
  return wp_list_categories(array('echo' => false));
}
add_shortcode('display-categories', 'display_category_list');

See developer wordpress See title_li parameter.

'title_li' (string) Text to use for the list title <li> element. Pass an empty string to disable. Default 'Categories'.

for hiding title change your code to

function display_category_list($atts) {
  return wp_list_categories(array(
    'echo' => false,
    'title_li' => '',
  ));
}
add_shortcode('display-categories', 'display_category_list');