just reading through you install guide at http://www.grocerycrud.com/documentation/how-to-install-a-new-theme
It doesn't tell you what file/s need to be modified with the example code
public function bootstrap_theme() { $crud = new grocery_CRUD(); $crud->set_theme('bootstrap'); $crud->set_subject('Customer', 'Customers'); $crud->set_table('customers'); $crud->columns('customerName','contactLastName','phone','city', 'country','salesRepEmployeeNumber','creditLimit'); $crud->display_as('salesRepEmployeeNumber','from Employeer') ->display_as('customerName','Name') ->display_as('contactLastName','Last Name'); $crud->set_relation('salesRepEmployeeNumber','employees','lastName'); $output = $crud->render(); }