If you wish to format the hebrew date as this (ignore the brackets): [כ"ז סיון ה'תשע"ה], since none of the 3 bitmasks include this format, you can use the CAL_JEWISH_ADD_GERESHAYIM mask, and then insert the ' into the year with the second line, as shown:
$hebdate = jdtojewish(gregoriantojd(6,14,2015),1,CAL_JEWISH_ADD_GERESHAYIM);
$hebdate = substr_replace($hebdate,"'",strrpos($hebdate," ")+2,0);