by default the CRUD add button name is the same as model name. how can we change that?
$tabs->addTab('Users')->add('CRUD')->setModel('Admin_User');
Set $model->$caption
of your model.
Set $crud->entity_name either by extending or by specifying second parameter to add('CRUD')
You can access button through $crud->add_button, and use either set() or setLabel().
$tab = $tabs->addTab('Users');
$crud = $tab->add('CRUD');
$crud->setModel('Admin_User');
$crud->entity_name = 'Text to be shown at Add button';
Or
$tab = $tabs->addTab('Users');
$crud = $tab->add('CRUD');
$crud->setModel('Admin_User');
$crud->add_button->set('Text to be shown at Add button');
OR
$this->add('CRUD',array('entity_name' => 'Text to be shown at Add button'));