Multiple ways to hide My Settings/Sign out/Personalize/My Profile in Welcome Username control in SharePoint 2010

Jquery  to hide My Settings, Personalize this page, Sign in as different user

jQuery(document).ready(function($){

  $("[text='Sign in as Different User']").remove();

  $("[text='My Settings']").remove();

  $("[text='Personalize this Page']").remove();

});

Hide My Site and My Profile using CSS
To hide the menu options, add the below CSS in master page

.ms-MenuUIUL LI[text='My Site'] {

 DISPLAY: none

}

.ms-MenuUIUL LI[text='My Profile'] {

 DISPLAY: none

}

.ms-MenuUIUL LI[text='My Settings'] {

 DISPLAY: none

}