An easy way to add items to the action buttons used throughout the SugarCRM UI.

AccountButtons.php

<?php

class AccountButtons {
  
	function add()
	{
		// Based on what action we're in, add some buttons!
		switch ($GLOBALS['app']->controller->action) 
		{
			case "DetailView": // Add buttons to Detail View

				$button_code = <<<EOQ
<script type="text/javascript">
	$(document).ready(function(){
		var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');

		// Add item to action dropdown on a detail view
		$("#detail_header_action_menu").sugarActionMenu('addItem',{item:button});

		// Add item to action dropdown for all subpanel records on the detail view
		$("#subpanel_list ul.records").each(function(){
			var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
			$(this).sugarActionMenu('addItem',{item:button});
		});
	});
</script>
EOQ;
				echo $button_code;
				break;

			case "listview": // Add buttons to List View

				$button_code = <<<EOQ
<script type="text/javascript">
	$(document).ready(function(){
		var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
		
		// Add item to "select all" dropdown button on list view
		$("#selectLinkTop").sugarActionMenu('addItem',{item:button});
		$("#selectLinkBottom").sugarActionMenu('addItem',{item:button});

		// Add item to the first slot of the "select all" dropdown button on list view
		$("#selectLinkTop").sugarActionMenu('addItem',{item:button,index:1});
		$("#selectLinkBottom").sugarActionMenu('addItem',{item:button,index:1});
	});
</script>
EOQ;
				echo $button_code;
				break;
		}
	}
}

buttons.js

$(document).ready(function(){

  // The button we're adding to the dropdowns
	var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
	
	// Add item to "select all" dropdown button on list view
	$("#selectLinkTop").sugarActionMenu('addItem',{item:button});
	$("#selectLinkBottom").sugarActionMenu('addItem',{item:button});
	
	// Add item to the first slot of the "select all" dropdown button on list view
	$("#selectLinkTop").sugarActionMenu('addItem',{item:button,index:1});
	$("#selectLinkBottom").sugarActionMenu('addItem',{item:button,index:1});

	// Add item to action dropdown for selected items on list view
	$("#actionLinkTop").sugarActionMenu('addItem',{item:button});
	$("#actionLinkBottom").sugarActionMenu('addItem',{item:button});

	// Add item to action dropdown on a detail view
	$("#detail_header_action_menu").sugarActionMenu('addItem',{item:button});

	// Add item to action dropdown for select items for all subpanels on detail view
	$("#subpanel_list ul.SugarActionMenu:not(.records)").each(function(){
		// need to recreate button variable for scope issues
		var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
		$(this).sugarActionMenu('addItem',{item:button});
	});

	// Add item to action dropdown for select items for a specific subpanel on detail view
	// (activities subpanel on account detail view)
	$("#list_subpanel_activities ul.SugarActionMenu:not(.records)").sugarActionMenu('addItem',{item:button});

	// Add item to action dropdown for all subpanel records on the detail view
	$("#subpanel_list ul.records").each(function(){
		var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
		$(this).sugarActionMenu('addItem',{item:button});
	});

	// Add item to action dropdown for all subpanel records on a specific detail view
	// (activities subpanel records)
	$("#list_subpanel_activities ul.records").each(function(){
		var button = $('<li><a href="javascript:void(0)" onclick="alert(\'Hello, world!\')">New Button!</a></li>")');
		$(this).sugarActionMenu('addItem',{item:button});
	});

	// Add item to action dropdown for all subpanel records on the detail view (lookup by id)
	// may have issues if record appears in mulitple subpanels on same page
	$("ul#38455ab8-bd8f-6ecb-213c-50c9eb8eb3d5").sugarActionMenu('addItem',{item:button});

});

example.js

$('#selector').sugarActionMenu('addItem',{
  item: $('<li><a href="#">New Item!</a></li>'), // a jquery element to add,
  index: 1 // (optional) set the exact order the new option will show in the list (1 being the first item)
});

logic_hooks.php

<?php

$hook_version = 1; 
$hook_array = array(); 

$hook_array['after_ui_frame'] = array(); 
$hook_array['after_ui_frame'][] = Array(1, 'Accounts InsideView frame', 'modules/Connectors/connectors/sources/ext/rest/insideview/InsideViewLogicHook.php','InsideViewLogicHook', 'showFrame'); 

// Add the new hook
$hook_array['after_ui_frame'][] = Array(2, 'Add Buttons to Account Module Views', 'custom/modules/Accounts/AccountButtons.php','AccountButtons', 'add'); 

there is a security issue on this code, have a look at salesagility/SuiteCRM#8752