$re = '/<(\w+)\s*[^>]*>|.(?=([^><]*<[^>]*>)*[^<>]*$)/m';
$str = 'abc<div style="left:100px;" > some <div>MyText, <strong> hgz uz <em> Some text for flrdm <p><b>b, <p> <p><h4><h1><span id="MySpan">any text, ';
$subst = "$1";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php