修复导航管理二级没有数据出现错误

application/admin/view/default/navigation/index.html

@@ -254,9 +254,11 @@
 									{{if !empty($v['items'])}}
 										{{foreach $v.items as $vs}}
 											<option style="padding-left: 30px;" value="{{$vs.id}}" {{if !empty($data['category_ids']) and in_array($vs['id'], $data['category_ids'])}}selected{{/if}}>二级 - {{$vs.name}}</option>
-											{{foreach $vs.items as $vss}}
-												<option style="padding-left: 60px;" value="{{$vss.id}}" {{if !empty($data['category_ids']) and in_array($vss['id'], $data['category_ids'])}}selected{{/if}}>三级 - {{$vss.name}}</option>
-											{{/foreach}}
+											{{if !empty($vs['items'])}}
+												{{foreach $vs.items as $vss}}
+													<option style="padding-left: 60px;" value="{{$vss.id}}" {{if !empty($data['category_ids']) and in_array($vss['id'], $data['category_ids'])}}selected{{/if}}>三级 - {{$vss.name}}</option>
+												{{/foreach}}
+											{{/if}}
 										{{/foreach}}
 									{{/if}}
 								{{/foreach}}