Hi Ross,

The all categories is blank for the “Sort Order” dropdown list, but this one works as expected.
The all_items_label for custom category is setting to “All”
If I add a “Test” heading, there is the html output :
OUTPUT

Ok I replace with this

// hook into the init action and call create_value_cat when it fires
add_action( 'init', 'create_value_cat', 0 );

// create two taxonomies, genres and writers for the post type "book"
function create_value_cat() {
    // Add new taxonomy, make it hierarchical (like categories)
    $labels = array(
        'name'              => _x( 'Type', 'taxonomy general name' ),
        'singular_name'     => _x( 'Type', 'taxonomy singular name' ),
        'search_items'      => __( 'Search Type' ),
        'all_items'         => __( 'All Type' ),
        'parent_item'       => __( 'Parent Type' ),
        'parent_item_colon' => __( 'Parent Type:' ),
        'edit_item'         => __( 'Edit Type' ),
        'update_item'       => __( 'Update Type' ),
        'add_new_item'      => __( 'Add New Type' ),
        'new_item_name'     => __( 'New Type Name' ),
        'menu_name'         => __( 'Type' ),
    );

    $args = array(
        'hierarchical'      => true,
        'labels'            => $labels,
        'show_ui'           => true,
        'show_admin_column' => true,
        'query_var'         => true,
        'rewrite'           => array( 'slug' => 'type' ),
    );

    register_taxonomy( 'filter', array( 'value' ), $args );
}

S&F Search UI form is configured like this

UI FORM SETTINGS

but the ul is still empty 🙁

my list categories output is working, and i’m not sure that this issue is due to add_action( 'init', 'create_value_cat', 0 ); because before I do not use it.
WEIRD :((