Above provides the solution:
and I applied to this plugin:
<?php
/*
Plugin Name: List Categories
Plugin URI: https://github.com/picandocodigo/List-Categories
Description: Simple plugin to display categories in any post or page
with a shortcode. It's basically a shortcode API interface to the
wp_list_categories WordPress function.
Version: 0.1
Author: Fernando Briano
Author URI: https://picandocodigo.net/
Copyright 2014 Fernando Briano (email : [email protected])
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
class ListCategories{
static function list_categories($atts, $content = null) {
ob_start();
$atts = shortcode_atts(
array(
'show_option_all' => '',
'orderby' => 'name',
'order' => 'ASC',
'style' => 'list',
'show_count' => 0,
'hide_empty' => 1,
'use_desc_for_title' => 1,
'child_of' => 0,
'feed' => '',
'feed_type' => '',
'feed_image' => '',
'exclude' => '',
'exclude_tree' => '',
'include' => '',
'hierarchical' => 1,
'title_li' => __( 'Categories' ),
'show_option_none' => __( 'No categories' ),
'number' => null,
'echo' => 1,
'depth' => 0,
'current_category' => 0,
'pad_counts' => 0,
'taxonomy' => 'category',
'walker' => null
), $atts
);
wp_list_categories($atts);
$output = ob_get_contents();
ob_end_clean();
return $output;
}
}
add_shortcode( 'categories', array('ListCategories', 'list_categories') );
?>
