改正错误

src/dashoo.cn/frontend_web/src/components/sidebar.vue

@@ -47,7 +47,7 @@ active-text-color="#1890FF"
                 <!--<i :class="'icon-before icon-'+sub.icon" style="padding-top: 5px; margin-right: 10px;"></i>-->
                 <span slot="title">{{ sub.name }}</span>
               </el-menu-item>
-              <el-submenu v-if="sub.children" :index="item.name" :key="sub.id">
+              <el-submenu v-if="sub.children" :index="sub.name" :key="sub.id">
                 <template slot="title">
                   <i :class="'icon-before icon-'+sub.icon" style="padding-top: 5px; margin-right: 10px;"></i>
                   <span slot="title">{{ sub.name }}</span>