gan_node_html.php
function removeClass($className) {
		if (!is_array($className)) {
			$className = array($className);
		}
		$class = $this->class;
		foreach ($className as $c) {
			$class = preg_replace('`\b'.preg_quote($c).'\b`si', '', $class);
		}
		if ($class) {
			$this->class = $class;
		} else {
			unset($this->class);
		}
	}
function removeClass($className) {
		if (!is_array($className)) {
			$className = array($className);
		}
		$class = $this->class;
		foreach ($className as $c) {
			$class = preg_replace('`\b'.preg_quote($c).'\b`si', '', $class);
		}
		if ($class) {
			$this->class = $class;
		} else {
			unset($this->class);
		}
	}
Remove clas(ses)
@param string|array $className