public function setting_no_tax_structure_callback_function()
{
$no_taxonomy_structure = CPTP_Util::get_no_taxonomy_structure();
echo '<input name="no_taxonomy_structure" id="no_taxonomy_structure" type="checkbox" value="1" class="code" ' . checked(false, $no_taxonomy_structure, false) . ' /> ';
$txt = __("If you check this, the custom taxonomy's permalinks will be <code>%s/post_type/taxonomy/term</code>.", 'custom-post-type-permalinks');
echo sprintf(wp_kses($txt, array('code' => array())), esc_html(home_url()));
}