use Company\BaseBundle\Entity\Category;

        # create new categories

        $cat_def_list = array('cat1' => null, 'cat2' => null, 'cat3'=> null);

        foreach(array_keys($cat_def_list) as $cat_name) {

            $newcat = new Category();

            $newcat->setName($cat_name);

            $manager->persist($newcat);

            $cat_def_list[$cat_name] = $newcat;

        }

            array('title'=>'Title 1', 'description'=>'Description 1', 'tags' => array('tag1', 'tag2', 'tag3', 'tag4'), 'categories' => array_values($cat_def_list)),

            array('title'=>'Title 2', 'description'=>'Description 2', 'tags' => array('tag2', 'tag3', 'tag4'), 'categories' => array($cat_def_list['cat1'], $cat_def_list['cat2'])),

            array('title'=>'Title 3', 'description'=>'Description 3', 'tags' => array('tag3', 'tag4'), 'categories' => array($cat_def_list['cat1'])),

            array('title'=>'Title 4', 'description'=>'Description 4', 'tags' => array(), 'categories' => array()),

            array('title'=>'Title 5', 'description'=>'Description 5', 'tags' => array('tag2', 'tag3', 'tag4'), 'categories' => array($cat_def_list['cat1'], $cat_def_list['cat2'])),

            array('title'=>'Title 10', 'description'=>'Description 10', 'tags' => array('tag1', 'tag2', 'tag3', 'tag4'), 'categories' => array()),

        $newdocs = array();

            foreach($doc_def['categories'] as $cat) {

                $newdoc->getCategories()->add($cat);

            }

            $newdocs[] = array($newdoc, $doc_def['tags']);

        foreach ($newdocs as $newdoc_array) {

            $newdoc = $newdoc_array[0];

            $tags = $newdoc_array[1];

            $this->container->get('wiki_tag.document')->addTags($newdoc->getId(), $tags);

            $manager->flush();

        }

        $manager->flush();