Filter get_cat_id for Custom Post Type

Question

I have this simple snippet to retrieve the categories (taxonomies) of my Custom Post Type 'portfolio' I need to display each taxonomy but it displays all the categories.

I just saw this question Filter get_categories() for taxonomy term in WordPress and unfortunately I tried with no success.

<?php
    query_posts("post_type=portfolio");
    if ( have_posts() ) : while ( have_posts() ) : the_post(); 
    $catid = get_cat_id('Images');
?>

<?php 
    $categories=  get_categories('child_of='.$catid.'&orderby=name'); 
    foreach ($categories as $cat) {
    $input = '<li><a href="#" data-value="category-'.$cat->category_nicename.'">';
      $input .= $cat->cat_name;
      $input .= '</a></li>';
      echo $input;
      }
?>

Can you please guide me or give me a hint? Thanks so much.

Answer 1

First, you are mixing up terminology a bit. Portfolio is taxonomy, but Work, Images, etc are terms (not categories).

So you need to adjust functions for your taxonomy. Try this:

Replace:

$catid = get_cat_id('Images');

Becomes:

$catid = get_term_by( 'name', 'Images', 'portfolio' );
$catid = $catid->term_id;

And:

$categories = get_categories('child_of='.$catid.'&orderby=name'); 

Becomes:

$categories = get_categories('child_of='.$catid.'&orderby=name&taxonomy=portfolio');