How to convert a menu tabs in menu links block?
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;
    }
  }
}