Put this in your theme or a layer where you want it to appear.
$this->output( backpath_to_breadcrumbs( $q_item['raw']['categorybackpath'] ) );
Here is the function.
function backpath_to_breadcrumbs($path) {
$delimiter = "::"; // text placed between breadcrumbs
$crumbs = explode("/", $path);
$crumbs = array_reverse($crumbs);
$previous = qa_opt("site_url");
$output = "";
foreach ( $crumbs as $crumb ) {
$output .= ' <A HREF="'.$previous.$crumb.'" CLASS="breadcrumb" REL="nofollow">'.$crumb.'</A> '.$delimiter;
$previous .= $crumb."/";
} // foreach
$output = trim( substr($output, 0 , strlen($output) - strlen($delimiter) ) ); // remove last delimiter ::
$output = '<SPAN CLASS="breadcrumb-list">'.$output.'</SPAN>';
return $output;
} // function