Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in xxx

[totolia]

Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /xxx on line 687

Nose que sucede, os pongo la linia 687 en cuestion

Código PHP:

  echo "<a href=\"index.php?ccms_module=Shop&action=reto&id=$idd\" class=\"huge_heading\">Retar</a>";