Drupal helper to display the breadcrumbs - decoupled from the theme

breadcrumb.php

<?php

/**
 * Helper to display the breadcrumbs
 * @return string Breadcrumbs markup
 */
function _display_breadcrubs() {
    $breadcrumbs = drupal_get_breadcrumb();
    return theme('breadcrumb', array('breadcrumb' => $breadcrumbs));
}