function wpb_catlist_desc() {
$string = '<ul>';
$catlist = get_terms( 'category' );
if ( ! empty( $catlist ) ) {
foreach ( $catlist as $key => $item ) {
$string .= '<li>'. $item->name . '<br />';
$string .= '<em>'. $item->description . '</em> </li>';
}
}
$string .= '</ul>';
return $string;
}
add_shortcode('wpb_categories', 'wpb_catlist_desc');