Sergey Biryukov

Restores and enforces the bundled jQuery in the admin if your theme registers a newer version which may not be compatible with WordPress yet.
You can try this plugin <a href="http://wpdevel.wordpress.com/2011/02/10/if-your-menus-or-widgets-screens-broke/" rel="nofollow ugc">if your menus or widgets screens broke</a>.

Restore Bundled jQuery

Restores and enforces the bundled jQuery in the admin.

Saurabh

Allows you to add Widgets in WordPress Navigation Menus via a custom widget area and an extra box in menu edit screen.
<blockquote>
Warning
You will need to have some CSS skills for the widgets to display properly in nav menus.
</blockquote>
<h4>Usage</h4>
<a href="https://wordpress.org/plugins/widgets-in-menu/screenshots" rel="ugc">View the screenshots</a> for usage instructions.
<h4>Source code and Contributions</h4>
<a href="https://github.com/yapapaya/Widgets-In-Menu-for-WordPress" rel="nofollow ugc">Fork on Github</a>
Contributions are always welcome
<h4>Documentation</h4>
<ul>
<li>Most documentation is inline.</li>
<li>The hooks (actions and filters) are documented in the <a href="https://wordpress.org/plugins/widgets-in-menu/other_notes/" rel="ugc">Other Notes</a>.</li>
<li>Some useful stuff is in the <a href="https://wordpress.org/plugins/widgets-in-menu/faq/" rel="ugc">FAQ section</a>.</li>
</ul>
<h3>Hooks</h3>
<h4>Actions</h4>
yawp_wim_pre_callback
Fires before a widget’s display callback is called. Similar to ‘dynamic_sidebar’ action.
Parameters
<ul>
<li>$yawp_wim_widget array An associative array of widget arguments.
<ol>
<li>string $name Name of the widget.</li>
<li>string $id Widget ID.</li>
<li>array|callback $callback When the hook is fired on the front-end, $callback is an array containing the widget object. Fired on the back-end, $callback is ‘wp_widget_control’, see $_callback.</li>
<li>array $params An associative array of multi-widget arguments.</li>
<li>string $classname CSS class applied to the widget container.</li>
<li>string $description The widget description.</li>
<li>array $_callback When the hook is fired on the back-end, $_callback is populated with an array containing the widget object, see $callback.</li>
</ol>
</li>
</ul>
<h4>Filters</h4>
yawp_wim_attribute_prefix
Filters the prefix used in class/id attributes in html display.
Parameters
<ul>
<li>$default_prefix string The default prefix: ‘yawp_wim’</li>
</ul>
yawp_wim_widget_params
Filter the parameters passed to the widget’s display callback. Similar to ‘dynamic_sidebar_params’ filter
Parameters
<ul>
<li>$params array
<ol>
<li>array $args An array of widget display arguments.
<ol>
<li>string $name Name of the sidebar the widget is assigned to.</li>
<li>string $id ID of the sidebar the widget is assigned to.</li>
<li>string $description The sidebar description.</li>
<li>string $class CSS class applied to the sidebar container.</li>
<li>string $before_widget HTML markup to prepend to each widget in the sidebar.</li>
<li>string $after_widget HTML markup to append to each widget in the sidebar.</li>
<li>string $before_title HTML markup to prepend to the widget title when displayed.</li>
<li>string $after_title HTML markup to append to the widget title when displayed.</li>
<li>string $widget_id ID of the widget.</li>
<li>string $widget_name Name of the widget. }</li>
</ol>
</li>
<li>array $widget_args An array of multi-widget arguments.
<ol>
<li>int $number Number increment used for multiples of the same widget.</li>
</ol>
</li>
</ol>
</li>
</ul>
yawp_wim_no_widgets_message
Filters the html displayed if no widgets are present in the sidebar.
Parameters
<ul>
<li>$no_widgets_output array The default output</li>
</ul>

Widgets in Menu for WordPress

Allows you to add Widgets in WordPress Navigation Menus

Restore Bundled jQuery vs Widgets in Menu for WordPress