PortfoliosController.php

if ($portfolio = DB::transaction(function() {

        $orig = Portfolio::findOrFail(Input::get('copy_portfolio'));
        $orig->load('authors', 'audiences', 'editorComment', 'uploads');

        $portfolio = $orig->replicate();
        $portfolio->title = Input::get('title');
        $portfolio->push();

        foreach ($orig->authors as $a)
        {
          $portfolio->authors()->attach($a);
        }
        foreach ($orig->audiences as $a)
        {
          $new = new Audience();
          $new->fill($a->getAttributes());
          $portfolio->audiences()->save($new);
        }
        foreach ($orig->editorComment as $a)
        {
          $new = new \EditorComment();
          $new->fill($a->getAttributes());
          $portfolio->editorComment()->save($new);
        }
        foreach ($orig->uploads as $a)
        {
          $new = new \Upload();
          $new->fill($a->getAttributes());
          $portfolio->uploads()->save($new);
        }

        $portfolio->save();
        return $portfolio;
      })) {
        $saved = true;
      }