Somebody? I really need to echo out the category feed url in de admin category area..
When you add a category term, it is added via AJAX. Thus you need to use jQuery or javascript to run off the Add New Category button click event, get the form field value, then display the constructed link somehow, such as a modal or inserting content into an existing DOM element.
To change the menu label, hook ‘admin_init’ and alter the label stored in the global $submenu array. I believe the reference is something like $submenu['edit.php'][15][0]