OTWthemes

Easily create all different kinds of Separators / Dividers for your WordPress site. Insert Separators / Dividers anywhere in your site – page/post editor, sidebars, template files. No coding is required. It is all done in a nice and easy interface.
Separators / Dividers Options
<ul>
<li>Margin Top and Bottom</li>
<li>Display Line</li>
<li>Text</li>
<li>Text Alignment</li>
<li>Link Text </li>
<li>Link URL</li>
<li>Custom CSS Class</li>
</ul>
Insert Separators / Dividers Anywhere in your site
Basically Separators / Dividers can be inserted anywhere in your site
<ul>
<li>Page/post WYSIWYG editor by using the buttion in the editor</li>
<li>In sidebars by using the OTW Shortcode Widget</li>
<li>In template files by using the Separator’s shortcode and WordPress do_shortcode function</li>
</ul>
Custom styling
If you need to further style a Separators / Dividers here are your options:
<ul>
<li>Each Separators / Divider shortcode has it’s unique CSS class that can be used to style all Separator / Divider.</li>
<li>Create a new class for each instance of a Separators / Dividers shortcode in its interface so you can style it individually.</li>
</ul>
Localization/Internationalization
This plugin comes Localization/Internationalization ready. It is following WordPress I18n standards.
Full version of the plugin
<blockquote>
Upgrade to the Pro version of this plugin – the fastes way to build your WordPress based site including regular updates and premium support: 
 <a href="https://1.envato.market/c/1246358/275988/4415?subId1=cm&subId2=2020&subId3=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fcontent-manager-for-wordpress%2F7431829&u=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fcontent-manager-for-wordpress%2F7431829" rel="nofollow ugc">Content Manager</a> | <a href="http://otwthemes.com/demos/1ts/?item=Content%20Manager&utm_source=wp.org&utm_medium=page&utm_content=upgrade&utm_campaign=cml" rel="nofollow ugc">Demo site</a>
</blockquote>
<ul>
<li>Custom Responsive Layouts – Build in Seconds</li>
<li>Front-end Editor – Edit your layouts and content in the front-end of your site</li>
<li>40+ Shortcodes with add/edit Interface, Custom and Imported Shortcodes</li>
<li>Insert Shortcodes Anywhere – Layouts, Page Editor, Sidebars, Template files</li>
<li>Insert Sidebars Anywhere – Layouts, Page Editor, Template files</li>
<li>WordPress Widgets Anywhere – Layouts, Page Editor, Template files</li>
<li>Content Sidebars</li>
<li>Support and Updates</li>
<li>Zero Coding Required</li>
</ul>

Separator Shortcode and Widget

Create Separators / Dividers. Nice and easy interface. Insert anywhere in your site - page/post editor, sidebars, template files.

Mark Howells-Mead

Allow separator (<code>HR</code> / line) and unlinked, text-only entries in WordPress’ classic navigation menus.
<h3>Block editor</h3>
This plugin does not support the Block Editor or the navigation block. It is intended for use with the <a href="https://codex.wordpress.org/WordPress_Menu_User_Guide" rel="nofollow ugc">classic menus</a> (e.g. <code>wp_nav_menu</code>).
<h3>Usage</h3>
<ol>
<li>Upload the plugin folder to the <code>/wp-content/plugins/</code> directory</li>
<li>Activate the plugin through the ‘Plugins’ menu in WordPress</li>
<li>Edit your menu in the “Appearance” section of WordPress Admin. Add a custom link entry, then use <code>---</code> (three dashes) as link text for a horizontal line or use <code>#</code> as a URL for an unlinked menu entry.</li>
</ol>
<h3>Filters</h3>
Version 2.1.0 of the plugin added two filters, with which developers can customise the output.
<ul>
<li><code>mhm-menu-separator/separator</code> allows customisation of a separator output. Receives the arguments <code>'<hr class="mhm-menu-separator">'</code> (the uncustomised HTML) and <code>$item</code> (the menu item).</li>
<li><code>mhm-menu-separator/title</code> allows customisation of an unlinked menu entry. Receives the arguments <code>$item->post_title</code> (the plain, unlinked menu item text) and <code>$item</code> (the menu item).</li>
</ul>

Add menu separators to navigation

I need something, I search for it and boom... it's here!
Thank you for this plugin, exactly what I wanted.

Wow, I love Wordpress

Allow separator (HR / line) and unlinked, text-only entries in WordPress' classic navigation menus.

Separator Shortcode and Widget vs Add menu separators to navigation