Add insert/edit link functionality to front end tinymce

I would like to know how do I use insert/edit link functionality at front end tinymce added by plugin.

Before that I thought I can use WordPress’s tinymce by wp_editor() but, wp_editor not working on ajax call at all (tried everything but failed). Then I used external tinymce script.

I have added custom button on new tinymce,

ed.addButton('new_link', {
        icon : 'new_link',
        title : 'New Link',
        onclick : function() {
            wpActiveEditor = true;
            console.log(wpLink);
            wpLink.open(); //open the link popup
            return false;
        }
});

I also enqueue the script,

wp_enqueue_script( 'wplink' );

Ref. – http://goo.gl/2g6EBC
Please help me to achieve this.