SO example

a-a.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

a-a.template.hbs

component a

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

application.template.hbs

{{tab-component}}

b-b.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

b-b.template.hbs

component b

tab-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  comp:'a-a',
  actions:{
  	tabChange(tab){
      console.log(tab);
    	if(tab === 1){
        this.set('comp','a-a');
      }
      if(tab === 2){
        this.set('comp','b-b');
      }
    }
  }
});

tab-component.template.hbs

<ul>
<li><a {{action 'tabChange' 1}}>Tab1</a></li>
<li><a {{action 'tabChange' 2}}>Tab2</a></li>
</ul>
{{component comp}}

twiddle.json

{
  "version": "0.6.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}