To run shortcode inside widget title you could add a filter on widget_title
add_filter( 'widget_title', 'do_shortcode' )
Sample usage, example you add [b] shortcode inside widget title:
Make my title [b]bold[/b]
Here’s how we could add some filters in it:
function boldify( $atts, $content = "" ) {
return "<strong>$content</strong>";
}
add_shortcode( 'b', 'boldify' );
add_filter( 'widget_title', 'do_shortcode' );
Output:
Make my title <strong>bold</strong>
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