PortfoliosController.php

$orig = Portfolio::findOrFail(Input::get('copy_portfolio'));

      $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();
        $new->fill_raw($a);
        $portfolio->authors()->save($new);
      }
      foreach ($orig->editorComment as $a)
      {
        $new = new EditorComment();
        $new->fill_raw($a);
        $portfolio->editorComment()->save($new);
      }
      foreach ($orig->uploads as $a)
      {
        $new = new Upload();
        $new->fill_raw($a);
        $portfolio->uploads()->save($new);
      }

      $portfolio->save();