How to convert a menu tabs in menu links block? It would be very useful to be able to change the "tabs menu" in "menu links" to specific pages and users roles. In order to customize the UI.

I have not found any module for this.
One of the ways is to simply change the menu type from MENU_LOCAL_TASK to MENU CALLBACK, and then simply create a menu item with the path.

Sample Code:
Cherry pick menu tabs and convert:

function MYMODULE_NAME_menu_alter(&amp;$items) {
  $items['node/%node/view']['type'] = MENU_CALLBACK;
  $items['node/%node/edit']['type'] = MENU_CALLBACK;
}


Convert all at once

function MYMODULE_NAME_menu_alter(&amp;$items) {
  foreach ($items as $key =&gt; $value) {
    if ($items[$key]['type'] == MENU_LOCAL_TASK) {
      $items[$key]['type'] = MENU_CALLBACK;
    }
  }
}