なぜ再帰が機能しないのでしょうか?

なぜ再帰は機能しないのでしょうか?

<br>
配列<br>
(<br>
[0] => 配列<br>
(<br>
[0] => 1<br>
[catid] =＆gt;
[1] =>
[ParentID] =＆gt;
[2] = & gt; 私たちについて <br>
[猫名] = >
[3] => 4<br>
[命令] =＆gt;
[4] = & gt; <br>
[アイテム] =＆gt;
[5] => 1<br>
[type] =＆gt;
[子] = & gt; 配列 <br>
(<br>
                                                                                                                                                                                                                                                          以来
(<br>
                                                                                                                                                             
[猫ID] => 2<br>
                                                                                                                                                   
[親ID] => 1<br>
                                                                                                                                                                                                                                                                                     なぜなら
[猫名] => 私たちについて <br>
                                                                                                                                                                                                                         
[リストオーダー] => 1<br>
                                                                                                                                                                          
[アイテム] => 0<br>
                                                                                                                                                                                 
[タイプ] => 1<br>
)<br>
<br>
                                                                                                                                                                                                                                                                                                          以来
(<br>                                                                                                                                                           
[猫ID] => 3<br>
                                                                                                                                                   
[親ID] => 1<br>
                                                                                                                                                                                                                                                                                             
[猫名] => 会社の名誉<br>
                                                                                                                                                                                                                         以来