<code>
<a href="javascript:;" data-id="1" onclick="showAjaxModal();" class="btn btn-primary    btn-single btn-sm">Show Me</a>
</code>

<code>
    <script type="text/javascript">
        function showAjaxModal()
        {
            var uid = $(this).data('id');

            jQuery('#modal-7').modal('show', {backdrop: 'static'});


            jQuery.ajax({
                url: "test-modal.php?id=" + uid,
                success: function(response)
                {
                    jQuery('#modal-7 .modal-body').html(response);
                }
            });
        }
        </script>
</code>

<code>
<div class="modal fade" id="modal-7">
    <div class="modal-dialog">
        <div class="modal-content">

            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                <h4 class="modal-title">Dynamic Content</h4>
            </div>

            <div class="modal-body">

                Content is loading...

            </div>

            <div class="modal-footer">
                <button type="button" class="btn btn-white" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-info">Save changes</button>
            </div>
        </div>
    </div>
</div>
</code>