Function

function retrieve_my_terms() {

    $prefix = 'haze_';

    //Portfolio Categories Select
    $config = array(
        'id' => 'portfolio_categories_meta',
        'title' => 'Choose Portfolio Categories to show',
        'pages' => array(),
        'context' => 'normal',
        'priority' => 'high',
        'fields' => array(),
        'local_images' => false,
        'use_with_theme' => true
    );

    $cats_meta =  new AT_Meta_Box($config);



    global $terms;

    $terms = get_terms('portfolio_cats');

    foreach ($terms as $term) {
        $option = $term->name;
        $cats_meta->addCheckbox($prefix.'checkbox_field_id',array('name'=> $option));
    }

    $cats_meta->Finish();
}