php/Tag.php
public function addClasses( array $classes ) {
		$this->classes = array_unique( array_merge( $this->classes, $classes ) );
		return $this;
	}
public function addClasses( array $classes ) {
		$this->classes = array_unique( array_merge( $this->classes, $classes ) );
		return $this;
	}
public function addClasses ( array $ classes ) { $ this -> classes = array_unique ( array_merge ( $ this -> classes , $ classes ) ) ; return $ this ; }
Add CSS classes.

@param array $classes List of classes to add
@return $this
Add CSS classes .