SpoonX/SxBootstrap — pull request #80 by siad007 (2013-07-12 18:42:29+00:00)
Title: dropdown menu with more than one page having child pages is not rendered

I wanted to create a dropdown with two elements, which have its own children. It ends up in a warning ```Warning: DOMNode::appendChild(): Document Fragment is empty``` and the second is not displayed.
Example navigation config to reproduce:
```
return array(
'containers' => array(
'container' => array(
array(
'name' => 'EntryOne',
'options' => array(
'label' => 'one',
'route' => 'one'
),
'pages' =>array(
array(
'name' => 'First',
'options' => array(
'label' => 'first',
'route' => 'first'
)
),
array(
'name' => 'Second',
'options' => array(
'label' => 'second',
'route' => 'second'
)
),
)
),
array(
'name' => 'EntryTwo',
'options' => array(
'label' => 'two',
'route' => 'two'
),
'pages' =>array(
array(
'name' => 'Third',
'options' => array(
'label' => 'third',
'route' => 'third'
)
),
array(
'name' => 'Fourth',
'options' => array(
'label' => 'fourth',
'route' => 'fourth'
)
),
),
),
// ...
```