Restricts certain menu items from appearing the WordPress Admin area. Useful for hiding unused features such as Posts or Comments from non-Administrator users.

gistfile1.php

<?php
/**
 * Restricts certain menu items from appearing the WP Admin area. Does not
 * affect Administrator users.
 *
 * @action admin_menu
 */
function fjarrett_restrict_admin_menu_items() {

 	// Don't restrict Administrator users.
	if ( current_user_can( 'manage_options' ) )
		return;

 	// Array of the menu item slugs you want to remove.
	$restricted = array(
		'menu-posts',    // Posts
		'menu-comments', // Comments
	);

 	global $menu;

	foreach ( $menu as $item => $data ) {

		if ( ! isset( $data[5] ) ) {
			continue; // Move along if the current $item doesn't have a slug.
		} elseif ( in_array( $data[5], $restricted ) ) {
			unset( $menu[$item] ); // Remove the current $item from the $menu.
		}
	}
}
add_action( 'admin_menu', 'fjarrett_restrict_admin_menu_items' );

Originally posted on: http://frankiejarrett.com/remove-specific-menu-items-from-the-wordpress-admin/