The grid can't display properly when its parent ( e.g., unactivated tab panel ) is hidden or not displayed.
It applies when grid is rendered in either bootstrap or jQueryUI tabs.
Fix is to refresh the grid whenever corresponding tab is activated.
$('ul.nav-tabs').on('shown.bs.tab', function (e) {
$gridPagos.pqGrid('refresh');
})
http://jsfiddle.net/6gxjb0hv/13/