I have created small application for which I have used bootstrap and HTML for front end and for backend PHP( Codeigniter framework) is used. My question is that how to call codeigniter's controller from bootstrap modal(i.e. popup menu based). Thanks.
If you are new to codeigniter please have a look to link . http://ellislab.com/codeigniter/user-guide/tutorial/index.html This might help you
You can can create a helper function where you can call your controller. Then you can call that helper function in modal. You can also use jquery and ajax.