$('.tab .title').find('.item')
 .removeClass('current').eq(index).addClass('current'); // 为index位置的title添加current
$('.tab .content').find('.item')
 .hide().eq(index).show(); // 显示index位置的内容

<div class="hd">
 <ul class="clearfix">
  <li v-for="(item, index) of list" :class="{active:selected==index}" @mouseenter="change(index)">{{item.title}}</li>
 </ul>
</div>
<div v-for="(item, index) of list" :class="{active:selected==index, item:true}" v-html="item.content"></div>

var app = new Vue({
 el: '#app',
 data: {
  selected: 0, //当前位置
  list: [
   {
    title: '11111',
    content: '11111content'
   },
   {
    title: '22222',
    content: '222222content'
   },
   {
    title: '33333',
    content: `<div>
        <span style="color:#f00">hello world</span>
        <p><input type="text" v-model="message"></p>
        <p>{{message}}</p>
       </div>`
   }
  ]
 },
 methods: {
  change(index) {
   this.selected = index;
  }
 }
})

<div class='bd' v-html="list[selected].content"></div>

// tab0
Vue.component('item0',{
 template : '<div>1111111content</div>'
});
// tab1
Vue.component('item1',{
 template : '<div>222222content</div>'
})
// tab2
Vue.component('item2',{
 data(){
  return{
   message : ''
  }
 },
 template : `<div>
     <span style="color:#f00">hello world</span>
     <p><input type="text" v-model="message"></p>
     <p>{{message}}</p>
    </div>`
})

<div class="hd">
 <ul class="clearfix">
  <li v-for="(item, index) of list" :class="{active:selected==index}" @mouseenter="change(index)">{{item.title}}</li>
 </ul>
</div>
<component :is="currentView"></component>

var app = new Vue({
 el: '#app',
 data: {
  selected: 0,
  currentView : 'item0',
  list: [
   {
    title: '11111'
   },
   {
    title: '22222'
   },
   {
    title: '33333'
   }
  ]
 },
 methods: {
  change(index) {
   this.selected = index;
   this.currentView = 'item'+index; // 切换currentView
  }
 }
})

Vue.component('my-slot-tab', {
 props : ['list', 'selected'],
 template : `<div class="tab">
     <div class="hd">
      <ul class="clearfix">
       <slot name="title" v-for="(item, index) in list" :index="index" :text="item.title"> </slot>
      </ul>
     </div>
     <div class="bd">
      <slot name="content" :content="list[selected].content"></slot>
     </div>
    </div>`
});

<my-slot-tab :list="list" :selected="selected">
 <template slot="title" scope="props">
  <li :class="{active:selected==props.index, item:true}" @mouseenter="change(props.index)">{{ props.text }}</li>
 </template>
 <template slot="content" scope="props">
  <div v-html="props.content"></div>
 </template>
</my-slot-tab>

Vue.component('my-tab', {
 props : ['list'],
 template : `<div class="tab">
     <div class="hd">
      <ul class="clearfix">
       <li v-for="(item, index) in list" :class="{active:selected==index, item:true}" @mouseenter="change(index)">{{item.title}}</li>
      </ul>
     </div>
     <div class="bd">
      <div v-for="(item, index) of list" :class="{active:selected==index, item:true}" v-html="item.content"></div>
     </div>
    </div>`,
 data(){
  return{
   selected:0
  }
 },
 methods : {
  change(index){
   this.selected = index;
  }
 }
});

<my-tab :list="list"></my-tab>