Find markup
$meta_query = array( 'relation' => 'OR', array( 'key' => 'meta_value', 'value' => '%<%', 'compare' => 'LIKE', ), array( 'key' => 'meta_value', 'value' => '%&%;%', 'compare' => 'LIKE', ), );
$meta_query = array( 'relation' => 'OR', array( 'key' => 'meta_value', 'value' => '%<%', 'compare' => 'LIKE', ), array( 'key' => 'meta_value', 'value' => '%&%;%', 'compare' => 'LIKE', ), );