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Change main content on a webpage using bootstrap

I am building a webpage using Bootstrap 3. I am trying to find the best way to change the main content of the side. I have a Header, left content and right content but I want to change the middle content by pushing a button without changing the surrounding elements. What would be the best thing to use to accomplish this. Is there some demos online that someone can point out? I have been trying to find some but without luck.

Bootstrap doesn't have that feature. First try to learn what bootstrap can do or can't, what bootstrap made for.
What you are trying to do is called templating. You can use php, ajax or other methods to dynamically add content to your content section of your template.

You have many ways to do that, maybe with jQuery .load() and maybe combined with HTML5 history API or some other framework...
But Bootstrap has nothing to do with that..
You can start reading about AJAX and DOM manipulation first, but here is some link you can use:
Dynamically Loading Content in Twitter Bootstrap Tabs

You cannot do that with boot strap that is just not what it's made for you can use either PHP or Ajax personally if you know PHP already and have everything set up for go with that because in my opinion Ajax sucks to learn and work with

Need guidance on solution using phonegap and jquery mobile

I'm creating an app using phonegap that pulls the majority of its content from a database. It has a few hundred pages so I thought the best option would be to use a single page solution and just keep loading content into the main div when needed.
I have tried using Handlebars to do this but I'm not sure if that was the best solution as I cant get jquery mobile working with it (the app needs lots of accordions). Have also tried creating my own very simple accordions but failed dismally to even get an onlcick event working within the handlebars script tags.
Can anyone recommend a build that would be good for this job please? Or guide me to some example solutions that are along these lines?
I have googled extensively for 2 days now and have tried quite a few suggestions out but no success so decided to post here.
Many thanks

Generate all the content into your div, but using css hide almost all of them. As the user does what needs to be done to activate your paging call the show() function for the first 10 elements, if you consider 10 to be a page.

Use List View pattern of jquery
// adding data on list view
$('#list_view').append('<li >' your data '</li>');
//refreshing list
$("#list_view").listview("refresh");
//removing elements from list
$("#list_view").empty();
You can use multiple div's as well in the list view
use below link for more:
http://api.jquerymobile.com/listview/

How to build a widget to embed in third-party websites using AngularJs?

I would like to create a angularjs widget that can be embedded in third-party websites with minimal code such as
<script src=mywidget.js type=...></script>
<div id="mywidgetContainer"></div>
or similar.
I found some resources such as this article for developing a widget using jquery http://alexmarandon.com/articles/web_widget_jquery/.
How would it be done using Angularjs? In what clever ways can angular features such as directives/views etc. be harnessed to this purpose? What are the gotcha's if any? Your thoughts/suggestions/opinions/experiences, please.

You should also keep in mind the possibility that the 3rd party website also uses angular,
and potentially a different version.
Check Multiple versions of AngularJS in one page

This is what seems to have worked for me. In the script I set the innerHTML property of the Container div to the angular view markup code. The key point is to use angular.$bootstrap to manually bootstrap the app after the page load. I did not see any particular value in creating a directive. A directive would need to be part of the view code that would still need to be assigned to the container using innerHTML.

jQuery Multipage/One-page system

I'd like to know how can I create a system using HTML, CSS and jQuery that simulates a multipage website using a single HTML page. One example of this feature is used in this website.
Is there a plugin to create this effect and transition?

the website link you have given here is actually a single page. There are many plugins to achieve what is happening there. one of them is
reveal.js it also has an online presentation creator present here
other one is impress.js but IE isnt supported

How to show/hide selected object like div?

So i'm trying out MVC after only playing with it some time ago.
Need to find the best way to selectively show and hide sections (divs, etc) on clicking or changing a value of a control, but not having to post back, i.e. javascript?
Any suggestions.

Use jQuery. You can use a jQuery Event to detect a click and then hide or show divs.
So, You have a button called "HideDiv" and "DivToHide" is the div you wish to hide.
$("#HideDiv").click(function() {
$("#divToHide").hide();
};
It's that easy. Can't really go in-depth here but check out their tutorials: http://docs.jquery.com/Tutorials or browse this site: http://www.learningjquery.com/category/levels/beginner
jQuery actually comes with ASP.Net MVC, check the scripts folder of a new MVC project and you'll see it in there. This site using jQuery and MVC :) So your browsing a sample of what is possible with it

You can use jQuery. It is included with the standard MVC project template.
$("#myButtonId").click(function () {
$("#myDivId").toggle();
});
See more at the jQuery docs for toggle.

You can do the same way as you are doing it with normal ASP.NET application using JavaScript. I think JavaScript is best as its fast and works on client-side.
If you are having a specific requirement then please put the specific requirement here.
You can use jQuery or MooTools if you want some animation.