I have written a custom block and put it inside the panel of "Add Content" page, but it can not change the breadcrumb. Actually the code in module includes drupal_set_breadcrumb() function, which doesn't work on “Add content” pages. My code is working on the others pages!
I need your help to change only the breadcrumb of each "Add content" page without using the available modules for drupal breadcrumb. Because I have written my code and the customization level is so high which can not be obtained with those modules.