<!DOCTYPE html>
<html ng-app="sample">

	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width" />
		<title>Ionic Side Menu Inside Tabs Example</title>
		<link href="//code.ionicframework.com/nightly/css/ionic.css" rel="stylesheet"/>
	</head>

	<body>
	  
    <ion-nav-bar class="bar-positive">
      <ion-nav-back-button></ion-nav-back-button>
    </ion-nav-bar>
	  <ion-nav-view></ion-nav-view>
	  
		<script src="//code.ionicframework.com/nightly/js/ionic.bundle.js"></script>
		<script src="app.module.js"></script>
		<script src="app.config.js"></script>
  
	</body>
</html>
## Simple tabs inside side-menu app
Notice how I used one common nav-bar for all views.
Also the arrangement may be a little different from what you'd want, but you get the idea.
var app = angular.module('sample', ['ionic']);

app.controller('MenuCtrl', function($scope, $ionicSideMenuDelegate, $state) {
  $scope.openLeft = function () {
    $ionicSideMenuDelegate.toggleLeft();
  };
});
app.config(function($stateProvider, $urlRouterProvider) {
  $stateProvider
  .state('tabs', {
    url: '/',
    abstract: true,
    templateUrl: 'tabs.html'
  })
  .state('tabs.home', {
    url: 'home',
    views: {
      'homeView': {
        templateUrl: 'home.html'
      }
    }
  })
  .state('tabs.menu', {
    url: 'menu',
    abstract: true,
    views: {
      'menuView': {
        controller: 'MenuCtrl',
        templateUrl: 'menu.html'
      }
    }
  })
  .state('tabs.menu.main', {
    url: '/main',
    views: {
      'menuContentView': {
        templateUrl: 'main.html'
      }
    }
  })
  .state('tabs.menu.about', {
    url: '/about',
    views: {
      'menuContentView': {
        templateUrl: 'about.html'
      }
    }
  })
  .state('tabs.settings', {
    url: 'settings',
    views: {
      'settingsView': {
        templateUrl: 'settings.html'
      }
    }
  });

  $urlRouterProvider.otherwise('/home');
});
<ion-view title="About">
  <ion-nav-buttons>
    <button class="button button-icon button-clear ion-navicon" ng-click="openLeft()"></button>
  </ion-nav-buttons>
  <ion-content padding="true">
    <div class="card">
      <p class="item item-text-wrap">
        This is a sample app. Just a demo. Plus, there's a sidemenu!!!
      </p>
    </div>
  </ion-content>
</ion-view>
<ion-view title="Settings">
  <ion-content>
    <div class="card">
      <p class="item item-text-wrap">
        Change something
      </p>
    </div>
  </ion-content>
</ion-view>
<ion-tabs class="tabs-icon-top tabs-positive">
  <ion-tab title="Home" icon="ion-home" href="" href="#/home">
    <ion-nav-view name="homeView"></ion-nav-view>
  </ion-tab>
  <ion-tab title="Settings" icon="ion-gear-a"  href="#/settings">
    <ion-nav-view name="settingsView"></ion-nav-view>
  </ion-tab>
  <ion-tab title="Menu" icon="ion-navicon-round" href="#/menu/main">
    <ion-nav-view name="menuView"></ion-nav-view>
  </ion-tab>

</ion-tabs>
<ion-view title="Home">
  <ion-content>
    <div class="card">
      <p class="item item-text-wrap">
        Welcome
      </p>
    </div>
  </ion-content>
</ion-view>
<ion-view title="Main">
  <ion-nav-buttons>
    <button class="button button-icon button-clear ion-navicon" ng-click="openLeft()"></button>
  </ion-nav-buttons>
  <ion-content>
    <div class="card">
      <p class="item item-text-wrap">
        This view has a side menu
      </p>
    </div>
  </ion-content>
</ion-view>
<ion-side-menus>
  <ion-side-menu side="left">
    <ion-content has-header="true">
      <ion-list>
        <ion-item href="#/menu/about" menu-close>About</ion-item>
      </ion-list>
      <ion-list>
        <ion-item href="#/menu/main" menu-close>Main</ion-item>
      </ion-list>
    </ion-content>
  </ion-side-menu>
  
  <ion-side-menu-content>
    <ion-nav-view name="menuContentView"></ion-nav-view>
  </ion-side-menu-content>
  
</ion-side-menus>