How to reload multiple pjax

Unfortunately Pjax by design doesn't allow multiple requests. In order to do those you have to nullify xhr parameter in $.pjax.

Basically like this:

$.pjax.reload({container:"#con_camp"});
$.pjax.xhr = null;
$.pjax.reload({container:"#con_camp1"});
$.pjax.xhr = null; // so that some next pjax request wont cancel this reload.

Try this.

   $.pjax.reload({container: "#1-pjax", async:false});
    $.pjax.reload({container: "#2-pjax", async:false});

You could just do

$.pjax.reload({container: '#container_1'}).done(function () {
    $.pjax.reload({container: '#container_2'});
});