How to show only specific categories/term-id in filter [closed]

Question

I have a portfolio template that shows all the portfolio_categories, with the possibility to filter among the categories. See: http://amazingtravel.se/wordpress/temaresor/

My question is how to rewrite this code to show only the categories of my choosing. For example, I want this template to only show the portfolio_categories "visa alla""fiske" and "dykning" in the filter.

    <li><strong><?php _e( 'Välj tema på din resa: ', 'onioneye' ); ?></strong></li>
    <li class="active"><a href="#" class="all" title="<?php _e( 'Visa alla resor', 'onioneye' ); ?>"><?php _e( 'Visa alla', 'onioneye' ); ?></a></li>
    <?php $terms = get_terms( 'portfolio_categories' ); ?>
    <?php $count_terms = count( $terms ); ?>

    <?php if ( $count_terms > 0 ) { ?>

        <?php foreach ( $terms as $term ) { ?>

            <li><a class="<?php echo $term->slug; ?>" href="#" title="<?php printf ( __( 'View all items filed under %s', 'onioneye' ), $term->name ); ?>"><?php echo $term->name; ?></a></li>

        <?php } ?>

    <?php } ?>

</ul>
<!-- END #filter -->

Answer 1

The function get_terms doesn't allow you to include / exclude specific categories / taxonomies. I think the get_categories function will help you.

<?php
    //first we get the id's of the terms you want to include
    $terms_inc = array("visa alla", "fiske");
    $term_ids = array();

    foreach($terms_inc as $term_inc)
    {
        //now we get the term ids by name and taxonomy
        $term = get_term_by('name', $term_inc, 'portfolio_categories');
        $term_ids[] = $term->term_id;
    }

    $terms_inc_string = implode(", ", $term_ids);
    //include only the ones we want
    $terms = get_categories(array('taxonomy'=>'portfolio_categories', 'include'=>$terms_inc_string));

    //You current code to loop over the terms.
?>

I haven't tested it, but I'm sure it will work. Let me know! Thanks.