Answers for "bootstrap popover css only"

bootstrap popover style width

.popover{
    max-width: 100%; 
    /* Max Width of the popover (depending on the container!) */
}

bootstrap popover on dynamic element

var popOverSettings = {
    placement: 'bottom',
    container: 'body',
    html: true,
    selector: '[rel="popover"]', //Sepcify the selector here
    content: function () {
        return $('#popover-content').html();
    }
}

$('body').popover(popOverSettings);