/**
 * @Entity
 */
class Category extends Nette\Object
{

    /**
     * @OneToMany(targetEntity="Article", mappedBy="highlightedIn")
     */
    private $highlighted;

    /**
     * @OneToMany(targetEntity="Article", mappedBy="category")
     */
    private $articles;

    public function getArticles()
    {
        return $this->articles->toArray();
    }


    public function getHighlighted()
    {
        return $this->highlighted->toArray();
    }

}

/**
 * @Entity
 */
class Article extends Nette\Object
{

    /**
     * @ManyToOne(targetEntity="Category", inversedBy="highlighted")
     */
    private $highlightedIn;

    /**
     * @ManyToOne(targetEntity="Category", inversedBy="articles")
     */
    private $category;


    public function setCategory(Category $category)
    {
        $this->category = $category;
        // $category->articles->add($this);
    }


    public function setHighlighted(Category $category)
    {
        $this->highlightedIn = $category;
        // $category->highlighted->add($this);
    }

}


$category = new Category();

$fooArticle = new Article();
$fooArticle->setCategory($category);

$barArticle = new Article();
$barArticle->setCategory($category);
$barArticle->setHighlighted($category);


// ...

$category->getArticles() // foo, bar
$category->getHighlighted() // bar