Callback to set boolean value

I have a boolean field in my db to indicate is a record is set to favorite or not

They only way to set the record to favorite now is to do it when adding the record or editing the record using a radio button

My question is how do i usecallback in order to set the value of favorite to 1=Yes or 0=No in the column itself., which means under the \

favorite column when i click yes on the data it become no, and when i click no it will become yes setting the boolean value of the field

to 0 or 1

the easiest way to show thisis the xcrud demo ajax button

http://xcrud.com/demos/index.php?page=action&theme=default

where when we click the x it becomes correct and vice versa

Thank you

public function lit_management()

{

$crud = new grocery_CRUD();

$crud->set_table('literature');

$crud->where('userid', $this->ion_auth->user()->row()->user_id);

$crud->set_relation('type_code','litcategory','catname');

$crud->display_as('type_code','Literature Type');

$crud->display_as('author_fname','Author(s)');

$crud->set_subject('Literature');

$crud->set_relation('relevant_code','littag','tagname');

$crud->display_as('relevant_code','Literature Citation');

$crud->display_as('file_url','Upload File');

$crud->display_as('isfav','Favourites');

$crud->required_fields('title');

$crud->columns('title','author_fname','type_code','your_tag','file_url','web_url','last_update','isfav');

$crud->set_field_upload('file_url','assets/uploads/files');

$crud->fields('title','author_fname','year','volume','type_code','your_tag','pages','topic','issue','file_url','web_url','relevant_code','description','isfav','userid');

$crud->field_type('userid', 'hidden', $this->ion_auth->user()->row()->user_id);

$crud->field_type('isfav', 'true_false');

$crud->callback_add_field('author_fname',function () {

return '<input type="text" maxlength="100" value="" name="author_fname" placeholder="Separate multiple authors using comma ,"> ';

});

$crud->callback_add_field('your_tag',function () {

return '<input type="text" maxlength="100" value="" name="your_tag" placeholder="Provide your own label for this literature"> ';

});

$output = $crud->render();

$data['judul'] = 'My Literatures';

$data['crumb'] = array( 'Literature' => '' );

$template = 'admin_template';

$view = 'hahaha';

$this->outputview->output_admin($view, $template, $data, $output);

}

this is my controller

Ray