title: php move nodes to parent array
body: <p>How could I move all nodes of the 'fields' array into its parent array '113', whilst unsetting 'fields' ?</p>
  
  <pre><code>    [a] =&gt; Array
      (
          [113] =&gt; Array
              (
                  [title] =&gt; asdfasdfas
                  [alias] =&gt; asdfasdfas
                  [fields] =&gt; Array
                      (
                          [jr_streetaddress] =&gt; Array
                              (
                                  [type] =&gt; text
                                  [label] =&gt; Street Address
                                  [data] =&gt; asdfasdffsd
                              )
  
                          [jr_towncity] =&gt; Array
                              (
                                  [type] =&gt; text
                                  [label] =&gt; Town / City
                                  [data] =&gt; Nottingham
                              )
                      )
              )
       )
  </code></pre>