filter-sitename.php

	<?php
	/**
	 * Allow italics to be used in the sitename.
	 *
	 * @action bloginfo
	 *
	 * @param mixed $output The requested non-URL site information.
	 * @param mixed $show   Type of information requested.
	 *
	 * @return mixed
	 */
	public function allow_html_in_sitename( $output, $show ) {
		if ( 'name' === $show ) {
			$output = html_entity_decode( $output );
		}

		return $output;
	}