Controlgroup Widget
With the Controlgroup Widget, we can group buttons together. Check out the jQuery Mobile Controlgroup Widget for more information.

var content = {};
content['my_controlgroup'] = {
  theme: 'controlgroup',
  items: [
    bl('Hello', 'node/1'),
    bl('Goodbye', 'user/logout')
  ]
};
return content;
Horizontal Grouped Buttons

This is accomplished with the data-type attribute set to horizontal:
var content = {};
content['my_controlgroup'] = {
  theme: 'controlgroup',
  items: [
    bl('Hello', 'node/1'),
    bl('Goodbye', 'user/logout')
  ],
  attributes: {
    'data-type': 'horizontal'
  }
};
return content;
