How to integrate the link embedded in custome HTML(using ) to breadcrums?
you can either extend the breadcrumb array with your link in your theme with theme_breadcrumb  (further information here) or drupal_set_breadcrumb in your module, or use one of the many modules around breadcrumb. maybe custom breadcrumbs fits your needs.

you can extend the breadcrumb array with html, like:

$breadcrumb[] = l(t('My first page'), 'node/x');


or push it to the second postion with array_splice, like:

array_splice($breadcrumb, 2, 0, l(t('My first page'), 'node/x'));