How to select dynamically in Bootstrap-select with multiple values

You can set the value for the select element using two methods.

For the first one, you can use the method that the bootstrap-select plugin provided: selectpicker(just like the above answer);

The second one is using jquery's method - trigger. Such as:

$('#myselect').val([1,3,4]).trigger('change');

Use Bootstrap-Select's val method:

$('#myselect').selectpicker('val', [1,3,4]);

http://jsfiddle.net/a4bxnwws/

See Bootstrap-Select's documentation.

If you use selectpicker class then

<select class="selectpicker" id="myselect" name="myselect[]" multiple>
    <option value=""></option>
    <option value="1">red</option>
    <option value="2">orange</option>
    <option value="3">green</option>
    <option value="4">blue</option>
</select>

And Your jquery code will be like below:

var select_items = ["1","3","4"];
$('#myselect').selectpicker('val', select_items);