gistfile1.txt

$modules = $this->input->post('modules');
$this->db->where('page_id', $page->id)->delete('page_modules');
if ($modules)
{
	foreach ($modules as $key=>$value)
	{
		$this->page_module_model->create(array(
			'page_id' => $page->id,
			'module_id' => $key
		));
	}
}