function solo_get_catalog_tree() { $terms = get_terms([ 'taxonomy' => 'katalog_solo', 'hide_empty' => false, 'orderby' => 'menu_order', 'order' => 'ASC', ]); if (is_wp_error($terms) || empty($terms)) { return []; } $items = []; foreach ($terms as $term) { $items[$term->term_id] = [ 'id' => $term->term_id, 'name' => $term->name, 'parent' => $term->parent, 'children' => [], ]; } $tree = []; foreach ($items as $id => &$item) { if ($item['parent'] == 0) { $tree[$id] = &$item; } else { $parent_id = $item['parent']; if (isset($items[$parent_id])) { $items[$parent_id]['children'][$id] = &$item; } } } return $tree; } function solo_simplify_catalog_tree($items) { $result = []; foreach ($items as $item) { if (!empty($item['children'])) { $result[$item['name']] = solo_simplify_catalog_tree($item['children']); } else { $result[] = $item['name']; } } return $result; } function solo_solutions_catalog_shortcode() { $catalog_data = solo_simplify_catalog_tree(solo_get_catalog_tree()); ob_start(); ?>