$(document).ready(function(){

  $('.selector p a').each(function(){
  
    var sHtml = $(this).html();
	 
    var iPos = sHtml.toLowerCase().indexOf('<br>');
	
    $(this).html('<span style="color:red" >' + sHtml.substr(0,iPos) + '</span>'  + sHtml.substr(iPos));
});
  
  });