PHPWord - 将HTML列表添加到.docx

I'm using PHPWord to generate .docx files from HTML. In my HTML file I've the following situation:

<ul><<li><span>test</span></li></ul>

When I execute the conversion, it shows an empty area. I tried to add the SPAN in parseChildNodes() method:

 $cNodes = $node->childNodes;
        if (count($cNodes) > 0) {
            foreach ($cNodes as $cNode) {              
                // Added to get tables to work                    
                $htmlContainers = array(
                    'tbody',
                    'tr',
                    'td',
                    'p',
                    'span'

                );
                if (in_array( $cNode->nodeName, $htmlContainers ) ) {                        
                    self::parseNode($cNode, $element, $styles, $data);
                } else{                    
                    // All other containers as defined in AbstractContainer
                    if ($element instanceof AbstractContainer) {                        
                        self::parseNode($cNode, $element, $styles, $data);
                    }
                }  
            }
        }

But it doesn't work... It still shows a blank area. How can I show the SPAN content inside the LI list item?

Thank you in advance!