How do i remove main menu title once it's in sidebar,
Welcome to the wild world of theme functions, friend. You're going to need to do some overriding of the main menu in a file called "template.php" which should be included in whatever base theme you're using. Create a function in that file that looks something like this:

function MYTHEMENAME_menu_link($variables){ // Code here }


Use this link as reference to understand how to change what's there: https://api.drupal.org/api/drupal/includes%21menu.inc/function/theme_menu_link/7

And for a real brain buster on everything you want to know about how to theme menus, check out this answer by Sheena, who's basically a genius: Advanced menu theming in Drupal 7