Wordpress - Allow HTML tags in Widget Title - No Plugin Required

allow-html-in-widget-title.php

<?php
/*
 * Author	: TechnoKnol
 * Blog		: http://technoknol.blogspot.com
 * Purpose	: Allow HTML tags in Widget Title in WordPress
 * 
 * */
// Add below code in your theme's functions.php file 
// Allow HTML tags in Widget title 
	function html_widget_title( $var) {
		$var = (str_replace( '[', '<', $var ));
		$var = (str_replace( ']', '>', $var ));
		return $var ;
		
	}
	add_filter( 'widget_title', 'html_widget_title' );

// Usage :    Use Forum type BB code styling just replace < & > with [ and ]
// If you wanna give class to tag , Apply without Quote. 
// See Example Below. 

Title with[span class=class_without_quote ]span Tag[/span]

There is no spacing after the span tag. The next word is close to the last word in the span and space is not available.

To use multiple classes you can use:
$var = (str_replace( '“', '"', $var));
and keep using " in your "HTML"

useful, thanks!